Bus. Filter Systems 3/4/07
Hello again all gurus at WWM!}
<Hello Aaron>
I would like to know your recommendations regarding filter systems for freshwater and salt water so as to see if we have been using the best, most effective, and cost conscious (in that order).
<Read here and linked files above for the info that we have.  I'm assuming that this is for a business, so I've attached two links.
http://www.wetwebmedia.com/AqBizSubWebIndex/flothrusysbiz.htm
http://www.wetwebmedia.com/marmechf.htm
And what are your suggestions on a RO/DI for a servicing application? It would need to be durable, and produce a good amount of water quickly, because I have seen some that have an output of about 1-2 gallons per hour up to 4-5 per hour.  That just seems SLOW to me. But I have been wrong before.
<Problem with RO systems is that they waste a great deal of water, probably on the order of 90%, depending on the system.  Adding a pump to the RO system
improves water produced vs. time.  Seachem has a model that will produce 200 gallons per day and averages $425. through etailers.  If you require more water per day
than this, you will need to Google for commercial systems.>
Aaron
Tanks-A-Lot
<You're welcome.  James (Salty Dog)>  

Water treatment question "in the life"   1/28/07
Hello Bob,
I am happy to finally be asking you a question after having used your website so much. I am an aquarium professional with over 15 years of professional experience and more as a hobbyist. I currently run an aquarium maintenance company which has been very successful for me and continues to grow at an ever increasing pace.
<Ah, good>
What I wanted to get your input on is tap water purification. I have talked in great length (through email) to the Poly-Bio-Marine guy about his products, which have been around for way longer then I have been doing this.
<Yes... those 'lucky dogs' have a few good to great products>
I remember first seeing some of his Poly Filter for sale at the first fish store I worked at. What this guy says makes sense about "why do we judge how pure water is by the mineral content?" Mineral content has nothing to do with all the dissolved poisons in the tap water.
<Correct... as a matter of principle here, wanting to be clear... The presence of (some) mineral content has actually the opposite to do with the presence of many such poisons>
I know those are hard to nearly impossible for laymen to test for while TDS is very easy to test.
Maybe the ease of this indicator (TDS) has much to do with it. But just because most of the Calcium and Magnesium etc. are being removed does not mean that Phosphates, Nitrates, Copper etc. are being removed as well....or does it?...
<Mmm, to variable extents, yes... Depending on the mode of their extraction, these alkaline earth elements are often bound with PO3,4, NO3 molecules...>
I don't believe so but please tell me if I am wrong.
Water is not horribly expensive where I live but I hate to waste anything in this world.
<Mmm, I'll skip right ahead here to my usual spiel (as my cohorts here at WWM have done all but six queries for me this AM... THANK YOU!), and suggest you look into what I would do... getting a good sized/volume Reverse Osmosis device... and vent the waste water to a pond for your use as well...>
I feel it is irresponsible. That is why I am beginning to become frustrated with my RO unit.
<Mmm, maybe looking into a better unit (there are a bunch... the Net...) or a PolyBioMarine "Steril"... or...>
Recently I have been trying to find a better and more economical way to purify tap water for use with my customers saltwater aquariums. My first priority is better, secondly economical. I currently use a 100 GPD RO/DI unit from Aquamaxx. It works great and everything but I got the feeling that there is a better way.
<There are>
I don't know how well DI by itself removes things like phosphates, in all its forms (organic and inorganic) and Nitrates and other poisons.
<Some units are very good at this indeed>
That is why I became interested in the Poly-Bio-Marine product. But I also worry that since my tap is very, very, very hard that the dissolution of synthetic seawater will be problematic.
<Mmm... not really a concern>
The Poly guy suggested I acidify the product water but that would be very problematic for me. I believe.
<... I would not acidify the water... But arrange to mix all in a container of good size using a purposeful mixer... We used to use a battery operated "troll motor" (as in for fishing) to mix such... along with a trickler charger for the battery...>
Well, I will end it here so as not to make this letter too long. I love your site and you guys keep up the good work. Cheers!
--
Ben Johnson
Captive Aquatic Ecosystems
www.caecosystems.com
<I do hope you don't mind my leaving your co. name and URL here... in the hope that someone might contact you with their input... I would go ahead with the PBM purchase (or similar) and not be concerned re kSP/solubility issues... the salts will dissolve just fine in DI water... as they presently do in the RO. Cheers, Bob Fenner>

Retail RO/DI   9/1/06
Hi Bob:
<Greg>
I have been doing a lot of research on large capacity RO/DI systems (I guess "large" is relative though!!).  Do you have any suggestions/preferences as far as brands, expense to operate, etc. of the various 500-1000 gpd systems designed for retail applications?
<Mmm, would have to take a look see with such descriptive terms on the Net really...>
I've seen quite a few but lack the experience to know what the real differences are.  
Thank you, Greg.
<Some units have "more" filtering modules as pre-filters, contactors... and some profess more material removal... but capacity, cost to obtain and operate (the availability of new membranes and cartridges importantly) are the most important considerations by far. As with most all "gear" questions, I'd "shop" this around on the various specialty BBs (ReefFrontiers, reefs.org...) and ask other aquarists what they've (recently) purchased, used. Bob Fenner>

- Deionization Systems -
Hi all at WetWeb,
Could you give me information on possible deionization systems that are available commercially and your opinion of them? <Hmm... difficult task. There are simply too many brands and too many becoming available to know them all... for the most part all use the same technology. Doubt there are many true differences between the various units available to the hobbyist.> I will soon be expanding my coral propagation biz, and I'm looking at the deionization factor rather than going with RO again due to the great amount of waste water generated by RO systems. <Would work with a commercial water purification company to design/install this.>
Many thanks,
Peggy
AquaCorals
<Cheers, J -- >

Ion exchange resins for water treatment (more industry) and water treatment equipment
Dear Sirs,
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We look forward to your early reply with much interest.
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Tel: 86-510-6336655
Fax: 86-510-6336655
Http:// www.suqing.com
Yours sincerely
Suqing Water Treatment Engineering Group Co., Ltd
Shen Xiaojuan
<I will post your message on our site (WetWebMedia.com) in the hopes others will contact you who have interest in your products. Bob Fenner>