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FAQs about Red Algae/Rhodophyte Identification 4

Related Articles: Red Algae in General, Coralline Marine AlgaeAvoiding Algae Problems in Marine System, Algae Control, Marine Maintenance, Marine Scavengers, Snails, Hermit Crabs, Mithrax/Emerald Green Crabs, Sea Urchins, Blennies, Algae Filters, Ctenochaetus/Bristle Mouth Tangs, Zebrasoma/Sailfin Tangs, Skimmers, Skimmer Selection, Marine Algae, Coralline Algae, Green Algae, Brown Algae, Blue-Green "Algae"/(Cyanobacteria)Diatoms, Brown AlgaeAlgae as Food

Related FAQs: Red Algae ID 1, Red Algae ID 2, Red Algae ID 3, Red Algae ID5, & Red Algae 1, Red Algae 2, Red Algae 3, Red Algae in General, Red Algae 2, Red Algae 3, Red Algae Behavior, Red Algae Compatibility, Red Algae Selection, Red Algae Systems, Red Algae Nutrition, Red Algae Disease, Red Algae Reproduction/Propagation, Coralline Algae, Marine Macro-Algae, Use in AquariumsAlgae as FoodMarine Algae ID 1, Marine Algae ID 2, Marine Algae Control FAQs II, Marine Algaecide Use, Nutrient Limitation, Marine Algae Eaters, Culturing Macro-Algae; Controlling: BGA/Cyano, Red/Encrusting Algae, Green Algae, Brown/Diatom Algae

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Marine Aquarium Algae Control

by Robert (Bob) Fenner

Red Fuzzy Coralline? '¦Not likely, perhaps another Rhodophyta -- 08/26/07 Hello crew! <Hi Dave, Mich here.> I have been researching your site and others trying to figure out what is growing in my 90-gallon reef. <OK.> I have a red feathery/fuzzy substance growing on a lot of my rocks, snails and hermit shells. <OK.> I was wondering if it was a type of coralline and harmless in my tank. <Only guessing without a pic.> I am very familiar with cyano and I don't think this substance is it. <OK, One of many possibilities off the table.> It is very difficult to scrub off, and grows in high flow areas unlike cyano. <Still leaves a plethora of possibilities.> I read a similar query asked by another gentleman on your site. The reply to him was that it was coralline, and that he should drop some vinegar on it to see if it bubbled to be sure that it was. I tried this experiment on my substance and it did not bubble. <Then it is likely not coralline or any other calcium based organism.> The other gentleman described it very well, in my opinion, by saying it appears to look like patches of red mold. <Many nuisance algae come to mind, red turf algae or red hair algae such as Polysiphonia, Asparagopsis, Anotrichum barbatum, Gelidium pusillus, or perhaps a beneficial organism such as a red tree Foram (Homotrema rubrum) Your expertise would be greatly appreciated. <A photo might help here.> Thank you all for this amazing site! <Thank you for your kind words!> Dave Kansas City, MO. <Mich Gouldsboro, PA.>

Re: Red Fuzzy Coralline? '¦Not likely, perhaps another Rhodophyta... BGA   8/28/07 Mich, <Hi there Dave.> Thank you, for your quick and very helpful response! <Welcome!> I have been researching your suggested algae species and I am continuing to have problems identifying which is growing in my tank. <Yes, does not look like what I was picturing in my head with out the photos.> I hope that they attached picture of the red substance growing on my glass magnet might help you take a better guess at what it is. <Mmm, pics are helpful. Is not a red tree Foram and likely not many of the algae I suggested previously, is a nuisance alga, likely a Rhodophyte, but beyond that I can't tell. Perhaps RMF will comment on the dailies page.> <<Is highly likely Cyanobacteria... a quick look under a few hundred power microscope would show the absence of nuclei, organelles, the distinctive circular DNA if higher powered... Please read on WWM re BGA... RMF>> This is the way it appears everywhere in my tank, (rock, hermit shells, powerheads) short, red, and fuzzy. <No fun. Perhaps some improvements in husbandry would help? http://www.wetwebmedia.com/nutrientcontrol.htm http://www.wetwebmedia.com/marine/maintenance/marineMaint.htm http://www.wetwebmedia.com/avoidingalgaeproblesm.htm > Thank you for your time, <Welcome, wish I could be more helpful. Mich> Dave Mmm, think I forgot to move an image into the emails with images folder... re: fw: re: Red Fuzzy Coralline? atten: Mich <No worries... was there somewhere. Found, posted> Also He stated earlier: It is very difficult to scrub off, and grows in high flow areas unlike cyano. <Is almost assuredly BGA... B>

Re: Red Fuzzy Coralline? '¦Not Likely, Perhaps Another Rhodophyta... Nah, Cyanobacteria -- 08/31/07 Mich, <Hi Dave.> Thank you again, for the quick and helpful reply. <You're welcome!> I was however disappointed that I could have some yucky cyano in my tank. <It happens to all of us. Glad you can't see my tank right now!> Let me give you a little background on my tank and husbandry. It's a 90-gallon reef with a medium bio-load. There is no detectable nitrites, nitrates, or ammonia. However with the phosphate test kit that I have, (which is very hard to read, maybe time for a new one.) I think I may have a slight amount of phosphate in my water, less than 5ppm (however, with the color chart its very hard to determine if its actually 0) Calcium and alkalinity are within parameters, and my ph. stays pretty steady, and high, around 8.4. I have an all-glass model 3 wet dry. <If you have a wet/dry, you most assuredly have nitrates, if your getting readings of zero it is because your algae, nuisance or macro is using it up. Yes, I do keep a close eye on my nitrates. ANS G-3 protein skimmer, which works great, and I use RO water. I religiously change 4-5 gallons of water weekly. <About twice that amount would be better.> I don't have a lot of live rock, around 75lbs, and my sand bed falls into the poor thickness range, 1 1/2 to 2 inches. <Nutrient sink and not deep enough to be very helpful with anaerobic metabolism.> So I consider myself very conscientious about my husbandry (except if it really is cyano, it has to be from me being such a sucker to my Kole tang.... he likes to eat, and I'm easy). <Heehee! Could be a contributing factor.> So when I saw that yourself and Bob both think its cyano, it really made me think about my feeding habits. <Nix the Wet/dry, deeper sandbed, add some macro, bigger or more frequent water changes...> Nevertheless, I took your advice and took a sample of it to the local high school, where my mother teaches biology and put it under a microscope. <Cool!> It took a few adjustments, but I found that this substance definitely has a cell wall and what appear to be organelles, however I could not identify a nucleus. If so, does cyano bacteria have anything that appears to be cell walls, because this substance had a definite structure? <Yes Cyanobacteria do have cell walls and although they are truly prokaryotic their internal membranes are elaborate and highly organized and may resemble organelles. The missing nucleus further suggests Cyanobacteria.> I understand its very difficult to take stabs at the millions of possibilities it could be, but your advice has been so beneficial thus far, I thought I'd put the ball back in your court. Any more guesses would AGAIN be very helpful. <As Bob suggested, is likely Cyanobacteria.> Thanks yet again, for your time and dedication to your absolutely wonderful site. <WetWebMedia is Bob's baby. I am but a minor contributor to his massive endeavor. But thank you for these kind words on behalf on Bob on the rest of the crew.><<Uh huh. RMF>> Dave
<Mich>
<Gouldsboro, PA>

Please help me ID and get rid of this Brown Algae   8/22/07 Hello. I've been trying to id this brown algae in my tank so I can figure out how to get rid of it, but haven't found any pictures that look like this algae. <Mmm... not a brown, but a Red: Peyssonnelia sp. An encrusting Red. Class Rhodophyceae, Subclass Florideophycidae, Order Gigartinales, Family Peyssonneliaceae.> Hoping you wonderfully knowledgeable reefers can help. :) I have some dark brown algae growing in circular patterns on my rock. Attached are 3 pictures of the same algae. What concerns me, is how much it has grown in 6 weeks. I looked at an old picture, and 6 weeks ago, there were a couple spots on one rock that were about the size of the tip of my pinky finger, and now they've grown into one spot about 2" in diameter. I thought this algae wouldn't be removable because it looks fused to the rock, but with some work, I completely was able to remove one circle about 1.5" in diameter. Came off in very small pieces. I thought it was slimy, but when I started pulling off pieces, it actually looks and feels like seaweed / kelp. My tank is pretty new....has been up and running for 4 months. My parameters are good, and I feed once a day and try to only give enough food that the fish can consume within 5 minutes. I use RO/DI water (Spectrapure MaxCap) with 0 TDS, and faithfully do bi-weekly water changes (10%). The sand bed looks good. It's just some good size patches of brown algae on the rock. No hair algae or any other type of nuisance algae. I had a small spot of bubble algae and turned the lights off for 3 days about a month ago and it disappeared and hasn't come back, but turning off the lights didn't do anything with this algae. Any idea what this algae is and what is the best option to get rid of it? <Please read here: http://www.wetwebmedia.com/redalgcompfaqs.htm and the linked files above> If I work on pulling it out manually, or using a toothbrush, will little pieces of it that might not make it to the skimmer, create an even bigger problem by spreading it around the tank? <Maybe...> Just FYI.... I recently added a second power-head to add some flow. (25x turnover now). I run my T5's for 10 hours a day, and the 150w MH only runs for 4 hours a day (only softies right now). All bulbs are only 4 months old. My parameters: Nitrates, Nitrites and Ammonia are all 0. Phosphates are .1 PH 8.1 Alk 2.9 Temp 82 going up close to 84 when MH's are lit Calcium 330 5 small fish in a 53 gallon tank. (2 small Perculas, 1 Purple Firefish, 1 Pygmy Possum Wrasse and 1 Tailspot Blenny) Thanks! Pam <Mmm, a few possible approaches here... Nutrient limitation... the growing of competitive species... Greens likely... Read on. Bob Fenner>

Re: Please help me ID and get rid of this Brown Algae  8/23/07 Thank you Bob. I'll start going through the links on the page you sent me. It looks more brown to me, than red, <Perhaps the photo itself has some artifactual color influence here> in person...but I know in the photos I sent, it definitely looks deep red. Any chance this could be Lobophora? <Mmmm, not much...> It's not lifting up at the edges at all, but maybe it hasn't gotten to that stage yet? <Bingo...> If it's definitely a red algae, any way that's best to remove it, or is manual removal the best option? Thanks, Pam....also an avid diver! :) <Actually, I'd enjoy it... likely increasing light intensity alone would disfavor either a Red or Brown/Phaeophyte, over a Green... Bob Fenner>

Mysterious Red Macroalgae   8/22/07 Hi crew. :) <Lindsay> I've browsed the internet, various online forums, and WWM for a few months now and cannot seem to find what kind of algae I have in my tank. <It's very likely Botryocladia> I attached a picture for you to look at. Basically, it's some sort of red bubble algae I'm assuming, but it's not like any species of Botryocladia I've ever seen. It also doesn't float, as Botryocladia should. <Mmm, doesn't always> When I touch the bubbles with my hands, they seem to be soft, but the bases are more tough. As you can see, there is no uniform color throughout each "bubble" and they are all different shapes. Most are a more ovalish shape, sort of like a UFO, instead of a circle. When I look at them, there is a definitely purplish hue on the tops of the bubbles white neon orange specks throughout. If you look closely at the picture, you can see what I mean. Also, the bubbles seem to enjoy high flow areas, and are loving growing on the output of my powerheads. They are also taking a liking to my snail shells and the exposed skeleton of fragged SPS corals. Lately, this algae has bloomed and spread, despite more frequent water changes, reduced feedings, PO4 removing material, etc. Any help at all would be much appreciated. Thank you for your time, Lindsay <Mmm, well, I'd siphon/while scrubbing to remove most all of it if it bothers you... It would likely "lose" to more vigorous Green species culture... Bob Fenner>

Coral ID... Nope algae Id... Rhodophyta   8/19/07 Would you please help identify this coral. <Yep, is not a coral. Is a red alga, a Rhodophyta. I've seen it before and have had some in my own tank. I am blanking on the species name right now and haven't had much success searching for it. Sorry. It is quiet pretty and generally does well. Enjoy it!> I purchased the sun coral about six months ago. This coral must have been attached to it, although not visible due to size. It has grown to about 2 inches since. It is soft and translucent. Does not retract when touched. <Cheers,
Mich>

Please Help Identify... Rhodophyta 8/10/07 Hi, <Hi Laura, Mich here.> I just want to say that all the articles that I have read on your site have been extremely helpful. At the moment I am stumped as to what type of plant/algae I have in my tank. I have researched and can't really find it. If you could please help me identify this and let me know if it is good or bad I would greatly appreciate it. It has been growing in my tank for many months now. I trim it back to help control it. None of my zoanthids seem to mind it much they just keep growing and spreading pushing their way through. None of my hermits, snails or fish eat it. Is this a safe algae to have or should I trim and extract all of it out of my tank. I do have to say that it is pretty and is about the color of coralline algae maybe a little darker and sometimes it casts a purple hue at it's edges. I have enclosed a picture. <Mmm, having a hard time telling from the photo. Is of the division Rhodophyta. If it is firm and not really flexible it may be a type of coralline algae, perhaps a Peyssonnelia sp. which would be desirable.> Again I just want to say you guys are great, sometimes I don't know what I would do without you. <Thank you for these kind words.> Many thanks in <Welcome, Mich>
Laura

Macro Algae ?? 7/21/07 Hello All, I have been enjoying the slow and steady outcome of my newest setups evolution. I had come across a small leaf of some sort growing on live rock. I left it alone and it slowly grew into this (pic attached) in approx. 4 months. At 9 months now and its twice the size. Intricate patterns stretch across the (now many) leaves. It appeared near my 7" Gold Crown Sarco and what was once a "neat little thing" is demanding as much ooohhs and ahhs. Especially when its the sarcos time of the month..wink wink. Unfortunately I haven't a clue what it is. I've done my homework here on WWM and cannot find a match anyone else have an idea?? I'll send a more current photo after my wife makes me clean the glass. J/K lol I'll take a pic when the daytime lights are on next time This pic is with actinics only. David Conway <Likely a Rhodophyte... but could be a Bryozoan... Need more detail in the image. Bob Fenner>

New Print and eBook on Amazon

Marine Aquarium Algae Control

by Robert (Bob) Fenner

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