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#1
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RO/DI and other random questions
I have a few questions so I thought I'd lump them all together.
For buying an RO/DI unit, 1. What should I be looking for? 2. Is there a big difference between brands? 3. How much should I be spending for a 100gpd unit? and unrelated, 4. What kind of filter do you folks use on an H or Q tank? Thanks
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Planning a first reef tank. Thanks for indulging me with all my questions. |
#2
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Best bang for your buck. You can add a TDS to this unit, this way you know how good your filters are. All that realy matters is a "0" TDS(Total disolved solids). Majority of filters last 6-12 months, depending on the amount and quantity of water changes. Also depends on your water quality. You can get a hand held TDS meter and test your water. Our water fluxs from 100-150 TDS, with an ro/di it is 0. As for filter's, spongue filters are pretty good.
http://www.bulkreefsupply.com/store/...rd-system.html
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210g Display Last edited by no_bs; 05-16-2011 at 04:59 PM. |
#3
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Quote:
1. See through cartridge housings for pre filters & DI. RO membrane housings are all white, no choice there. Dual TDS meter included, pressure guage included, although you can get that locally after market fairly easily. Number of pre filter stages will vary depending on your requirements. Chloramine treated water will generally require an additional carbon stage, whereas with chlorine, one will suffice. DI cartridge should be mounted vertical as opposed to horizontal, more efficient that way. 2. Can be, but most systems are assembled by the vendor from generic components. The RO membrane is fairly important, seems the DOW Filmtec is one of the best, so look for that. Cheaper systems will tend to have white pre filter housings and poorer quality pre filters. They may also have lower quality carbon stages. These can easily be replaced later. Pre filter should be at least 5 micron. 3. In the $250 range for a quality system with most of the options I mentioned in 1. Pre filters, housings & membrane will all be top notch. Better to go for 75 gpd since the rejection rate is higher for that membrane than the 100. Might be a little slower in production, but TDS will be lower out of the membrane, before the DI stage. 4. Can't speak to this, I have neither, been rolling the dice with additions and so far OK. Fish that have died on me would not have fared better in a H or Q. One power head victim Lawnmower Blenny, one carpet surfer Lawnmower Blenny, two starved Lawnmower Blenny, Copperband Butterfly & some Damsels - Blue Devil & Chromis that just kept taking each other out. Needless to say, for the sake of Lawnmower Blennies I've given up on keeping one, same goes for Copperband, they're way too iffy and shouldn't even be offered in the trade IMO. Never had an issue with corals.
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Mike 77g sumpless SW DIY 10 watt multi-chip LED build http://www.canreef.com/vbulletin/showthread.php?t=82206 Last edited by mike31154; 05-16-2011 at 05:15 PM. |
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