FAQs about Powerheads and their Modification in
Related Articles: Powerhead Impressions
by Steven Pro, Inexpensive
Wavemaker Impressions, by Steven Pro Circulation, Aeration, Water
Flow, How Much is Enough, Marine System Components, Refugiums, Central
Live-holding Systems, Refugiums,
Related FAQs: Powerheads
1, Powerheads 2, Rationale, Selection, Application, Problems/Repair, By Manufacturer,
Makes/Models: Aquarium Systems
(Maxi-Jets, Visi-Jets), Hagen
(AquaClear), Tunze, Other Models/Manufacturers, Marine Circulation 1, Wavemakers, Marine Circulation 2, Marine Circulation 3, Marine Circulation 4, Marine Circulation 5, Aeration, Pumps, Plumbing, Make Up Water Systems, Sumps, Refugiums, Gear Selection for Circulation,
Pump Problems, Surge Devices,
Circulation Advice (Detritus Accumulation) --
I sing your praises daily. You have been tremendous help with managing
my saltwater and freshwater tanks and pond. Thank you.
<<Ah! We are pleased to be of service>>
I have a year old 120 gal reef with 30 gal Chaeto algae sump. It was
created with contents from tanks that were 2 years old when I set up
the 120. I have a large wall of live rock in the center of the tank
running lengthwise. Various corals (mostly soft) growing along it. I
have not been able to get my nitrates below 5-10 ppm (mg/L).
<<Mmm, actually this level is not/should not be too problematic
(though I like to see a range of 5ppm or less). A 'small
amount' of Nitrate is 'beneficial' to your coral's
I have tweaked and adjusted, and finally think that my circulation is
I can blow off the rocks with a Maxi-Jet and days later the rocks are
covered with gray sediment (detritus?).
<<Yes'¦along with some fine substrate material,
I use a turkey baster almost daily to puff off the rocks as well. I
have rearranged the 3 Maxi-Jet 1200 powerheads in every position w/ no
<<Hmm'¦these may be insufficient to provide enough
turbulent flow for this size tank>>
The return from the sump is a Mag-12 which is also directed to blow off
rocks. I cannot seem to keep the front of the "wall" and the
back clean at the same time and prevent a sandstorm or causing corals
to retract from too much force.
<<Indeed'¦ The 'narrow' laminar flow from the
pump/powerheads can often be difficult to utilize effectively. Rather
than pointing the flow down at the rock, it may work better if you
arrange the powerheads near the top of the tank and position them to
converge their output streams along the upper layer of the tank,
providing more chaotic flow to help keep detritus in
I have Hydor rotators that I have used but nothing seems to help. I cut
way back on feeding and even with that I still have sediment. It has
also caused red slime algae buildup on the rocks. I am not opposed to
rearranging the rockwork if needed
<<An 'open' structure to allow flow 'behind' the
wall could help>>
and I am willing to bite the bullet and purchase other powerheads if
they would do a better job (like the Tunze). I looked into the Tunze
but wasn't sure what model and if it would even help.
<<The Tunze Stream pumps would be a good upgrade'¦lots
of flow without the damaging effects to your corals from a narrow
laminar water stream (though they can still cause damage if positioned
to closely to livestock). I utilize the Stream pumps in my own reef
system and truly love them. But if money is an issue, and considering
you already have some Maxi-Jet powerheads on hand, consider upgrading
each of these with a Sure Flow 1600 Maxi-Jet upgrade kit like this:
For about $12.00 you can triple the flow from your Maxi-Jet powerheads
as well as change the output stream to a wider, more coral-friendly
flow type. The added water movement will certainly help with keeping
detritus in suspension to be utilized by your corals or removed by your
filtration system. I have experimented some with these units on my 375g
display tank, and I am quite impressed with their
My salt is pretty stable at 1.025.
I do about 10 gallon water change weekly with well water and once every
4-6 weeks a 30 gallon change.
<<Mmm, your well water may be a problem re the Cyanobacteria.
Very often, well water is not as 'pure' as we like to think,
due to ground contamination from heavy metals/mineral deposits and/or
agricultural runoff. I suggest you at least test this'¦and
consider the use of a RO/DI unit for your reef's top-off and
I have a 760 watt PC/MH combo light that runs 12 hours for the PC and 6
hours for the MH.
<<The MH lighting period should be of a more 'Tropical'
length of 10-12 hours'¦in my opinion>>
My calcium is about 300 ish - I can't get that up. I use the 2 part
B-ionic system. This was my other problem. Not sure how to deal with
<<These two-part products usually work pretty well, perhaps the
dosage needs to be bumped up'¦or'¦maybe your test kit
It is difficult to read the pH card colors but I read it is 8.4. I have
a Tunze 9010 skimmer that I need to clean 2x week.
<<A nice piece of gear>>
Blue hippo tang
1 clown that resides in a rose tip anemone
6 line wrasse
2 yellow tail blue damsels
Bi color blenny
Lots of Nassarius snails (at least 100 or so)
A handful of hermit crabs
Frogspawn that has not gotten any larger!
Orange sun coral that is growing leaps and bounds!
Sinularia that will not extend
Trumpet corals that look great
Candy cane corals that look great and are growing
Many colored zoos all doing well
Thanks for your help and advice. Any guidance is greatly
<<Do try beefing up the flow as discussed'¦and look to
that well water as a possible (probable) source of
'undesirables''¦ Cheers'¦ Eric
Koralia Pump and Anemone Problem
Intake Covers 9/23/09
I recently bought a RBTA and he has been busy moving about the tank,
which brings me to my issue. I have a Koralia 4 powerhead, which
hasn't been running since I bought the RBTA because I didn't
want it to get sucked in.
<A definite possibility.>
Is there anything that I can do to safeguard the pump and turn it back
<Several manufacturers sell very thin spongy foam material that
stretches around this style of powerhead. However it will significantly
decrease the flow created by it.>
I was thinking of putting something like pantyhose around the pump and
turn it back on. Is this reasonable or is there a better option?
<As above, although the pantyhose idea is interesting, if they
really are still made of nylon they shouldn't be any
Any input will be greatly appreciated.
Thanks in advance,
Re: Intake Covers, Koralia Pump and Anemone Problem -
Thanks for the quick response Josh.
<I'm sorry I took so long this time, I just got back from a
I was thinking about it some more last night and came up with an idea.
What about using zip ties to break up the size of the slits? I could
make the gaps as big or small as I want and this may not reduce the
flow as much. Also, I was thinking the right size rubber band might
work as well. Any thoughts.
<I'm afraid either of these ideas will likely cut down on flow,
and the anemone can get sucked into to very very small intakes, so it
likely won't solve that problem either.
Another Use For Those Cone Feeders --
Jim, my supplier wanted me to share this with your readers as he
thought it was a great idea.
In addition to the airstone trick (used either in sump or behind
overflow walls) as a means of raising pH, there is another handy trick
I came up with out of necessity. I feed all my discus (as well as my
reef) using cone feeders. I came up with the idea of buying the 3-way
cone feeders and using the cones themselves on the powerhead intakes to
keep the impellers/intakes from becoming clogged. The suction of the
powerheads holds the cone in place and is easily removed for regular
cleaning or if you only want to keep them in place when people clean
their reefs. They are also great for keeping soft polyped corals and
small fish from being taken up by the strong suction of the powerheads.
I use cones on all my reef powerheads. I also use a handheld powerhead
for cleaning my reef itself and put a cone on one to keep the cleaning
powerhead running well as it pushes out all the detritus etc. from
between the rock work. Just a little idea Jim and I thought worth
<<Nifty ideas'¦ Thanks for sharing. EricR>>
DIY Magnet, for powerhead securing
Good Morning Crew!
It's such a relief to be able to bounce ideas and problems off of
all of you wonderful people! I've had my first tank ever up and
running for about 8 months now. It's a 30 gal FOWLR and I'm
trying to keep enough
circulation going but my powerhead's suction cups seem to
They really just don't like to stay stuck to the glass, which can
create quite a mess. So I've been looking at alternatives, and I
really like Hydor's Koralia powerheads, because of the
magnet/suction cup combination,
but my girlfriend doesn't care too much for the price. :( Anyway,
I've been thinking about just gluing a magnet on the back of the
one I already have, but I can't seem to find any information on
what kind of magnet would be marine safe.
<No magnets are safe unless they are encapsulated in
I've seen magnetic clips made for this type of project but
unfortunately they cost more than the powerhead I want in the first
<Nah, have you seen these?
Just trying to shave a little cost here. So... 1: What type and where
could I get a cheap magnet that would be marine safe, and 2: What type
of glue/epoxy would work good for this application?
<For the time and expense involved creating your own, you would be
better off to buy the Sure Grip magnets. The Koralia powerheads are a
good buy in circulation pumps. Considering they come with the magnetic
holder and are very energy efficient (Koralia 1, 400gpm/3.5 watts),
make them a bargain for water movement. Compare to a Maxi Jet 1200
which has a flow rate of 295gph and draws 20 watts.>
Thank you so much for your time and valuable insight.
<You're welcome. James (Salty Dog)>
Attaching Maxijet 1200 to a magnet - 03/12/2006 Hi, I
have been trouble <Mmm> attaching my MaxiJet 1200 to the walls of
my 120 with the suction cups provided. Some suggest
gluing/using epoxy to attach the pump to a algae scraper
magnet. In your experience, will such a setup damage the
impeller (when used in conjunction with a wavemaker). Thanks
<Shouldn't affect the impeller. BobF> Paint inside
tank Quick question. Do you guys know if there is a paint I can use
to cover my powerheads? I have these teal colored PH and if I could
tape it up and make sure that after it dries it can still be taken
apart I would like to paint or spray it black. I know people have
painted or sprayed their PVC. Does anyone know what kind of paint that
is? Thank you in advance. <You might try epoxy paints... but even
they will wear given the heat generated by the powerheads. Better to
"hide" them behind rock, decor. Bob Fenner> Josh
9-10 Foot Power Cord for Small Pump 11/17/05 I have a
saltwater aquarium (cylinder shape) that is in the center of our spiral
staircase and measures 8 feet tall and 4 feet in diameter.
<Wowzah!> I would like to purchase a small pump (maybe Rio?) to
submerge in the tank, mounted near the bottom to circulate water
slightly around the bottom of the tank. <Mmm, I would investigate a
bit more, look for a better-regarded manufacturer/line> I have good
circulation at the top of the tank, but I feel there is stagnant water
at the bottom and am concerned about high nitrates at the bottom of the
tank. <Need to circulate all... including top to bottom... you might
"tilt" your pump/discharges accordingly> Unfortunately, I
have not been able to obtain a small pump with a power cord longer than
6 feet. Ideally, I would prefer a pump with a 9-10 feet power cord, but
I would settle for one that has a 8 ft cord. Any suggestions or
direction to a source of supply would be greatly appreciated. Thank
you! Brett <Mmm, I would contact the manufacturers (by name)
directly re... it isn't hard/impractical to splice an extension and
make this water proof... but the companies actually making these units
can/will make special orders (I'd get double the number you want
and save the other set for back-up). Cheers, Bob Fenner>
Re: 9-10 Foot Power Cord for Small Pump 11/17/05 Bob,
<Brett> Thank you for your response to my question! I am
impressed by your timeliness - I work at Toyota where providing the
best Customer Support is ingrained in everything we do and I appreciate
your quick response. <Ah, an excellent company all the way around...
I grew up in Japan, visited "Toyoda" (not a mis-spelling for
you browsers), and can remember how amazingly clean everything was...
no buttons, watches on the employees (lest finishes be scratched)...
all working together harmoniously... And have owned Toyotas (trucks
mostly the 22R engines, wife has a Prius)... And what do they
"run" the co. on? Capital! Not debt! How un-American...
Forget "super-discounts"... Uhh, just make quality products,
supply good svc.... am sure you would say about the same...> I will
pursue the advice to contact the pump manufacturers directly for a
custom length power cord. Do you have any contact info for pump
manufacturers? <Mmm, yes... Can be found by the distributors names
(Hagen in Canada, Aquarium Systems, TAAM-Rio...> Since you do not
seem impressed with Rio, I would welcome any other names (phone numbers
or websites) that I could pursue. Thank you again for your cooperation!
Brett <Please make it known if you'd like help finding these.
Out of time for now. Cheers, BobF>