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Old 12-16-2012, 01:27 PM   #11
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Buy a RO/DI unit and start with good water. If you start by using tap water you will pay for the RO/DI twice trying to kill the algae and remove the nutrients that is in tap water. I learned the hard way
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Old 12-16-2012, 07:19 PM   #12
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Geez, so much equipment!! Okay, so I have no idea about RODI water...does anyone care to enlighten me? I know what it stands for, but not a clue why you use it for saltwater tanks. *blush*
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Old 12-16-2012, 07:21 PM   #13
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Geez, so much equipment!! Okay, so RODI machine.. Does anyone care to enlighten me as to why it is needed? I understand that it deionizes water, but what does this do for the reef? Im such a saltwater noob :/
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Old 12-16-2012, 07:22 PM   #14
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Gah. Stupid iPod app told me the first one didn't post...made another post then noticed I had posted twice. Sorry!
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Old 12-16-2012, 07:24 PM   #15
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It is totally purified and free from any type of dissolved solids and heavy metals.
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Old 12-16-2012, 07:34 PM   #16
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A RODI unit first takes out particulate matter through the sediment filter which removes dirt and rust from the water pipes. This is stage 1. Then the water gets passed through a carbon block which removes chlorine and other dissolved organics. Some units have 2. Then next stage is the RO membrane which does the majority of the purification. Lastly, the water gets passed through deionization resin to further purify the water to 0 tds(total dissolved solids). Its important to use RODI water because the chlorine will kill off corals and fish. (Which u probably know from fw). But phosphates must be removed because the fuel algae growth. With such strong lighting for corals, algae will thrive under minuscule amounts of phosphate. Does that help?
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Old 12-16-2012, 08:11 PM   #17
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+1 on Tigerbarbs

For the longest time I tried to keep corals with tapwater and had very little success and LOTS of nuisance algae. I broke down and bought an RO/DI unit and it became easy to keep LPS and Soft corals. They just thrived. That was the missing piece of the puzzle I put off for a long time. If I had to pick one piece of equipment that is a necessity for a reef tank, it would be an RO/DI unit. You can get away with tap water for fish, but not corals IMHO. These guys have decent units for a good price.

RO/DI Systems

You don't need a large capacity unit. Whatever you can afford. Just make sure to get a TDS meter with it to test what is coming out. This will make sure the water is pure and you will know when the resins start to fail and need to be replaced.
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Old 12-16-2012, 08:23 PM   #18
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I was lucky enough to get one from bulk reef supply and im thrilled with it! Its the 4 stage plus unit. 75gpd. I may get the 150gpd upgrade kit though to cut back on waster water
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Old 12-17-2012, 12:09 PM   #19
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Quote:
Originally Posted by TigerBarbs
A RODI unit first takes out particulate matter through the sediment filter which removes dirt and rust from the water pipes. This is stage 1. Then the water gets passed through a carbon block which removes chlorine and other dissolved organics. Some units have 2. Then next stage is the RO membrane which does the majority of the purification. Lastly, the water gets passed through deionization resin to further purify the water to 0 tds(total dissolved solids). Its important to use RODI water because the chlorine will kill off corals and fish. (Which u probably know from fw). But phosphates must be removed because the fuel algae growth. With such strong lighting for corals, algae will thrive under minuscule amounts of phosphate. Does that help?
Thank you!!! That helped a lot, and has now convinced me that an RO/DI is necessary. With nine freshwater tanks, the volume of dechlorinator I go through is shocking-I have no doubt that this machine will be worth it's weight in gold if that's what it does to the water! Okay, add that to the list of equipment I need. Next question- I saw "marine-glo" lights that said "T8" on them. I've heard T5 are the best...but what's the difference? I've never had a planted tank for fw (all my fish eat plants) so I don't have any experience with special lighting.
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Old 12-17-2012, 03:14 PM   #20
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Im not sure but i have t5. It works great. I have soft, lps, and a couple sps corals that are thriving
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