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Old 02-19-2005, 12:29 AM   #1
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Just purchased a RO/DI unit from filterdirect and.....

My 75 gal tank has been setup for about 6 weeks. I set it up and did a waterchange / topoffs using the Aquarium Pharmaceuticals Tap Water Filter. I did some research and its needless to say that I quickly found out this water filter doesn't remove TDS sufficiently enough to support corals/anemones. I'm just happy that my PBT and clown have been doing OK despite using this bad filter. Not only that, but this filter is more expensive to maintain than an RO unit is because the filter pad only lasts about a month before needing to be replaced. So I went on ebay and picked up filterdirect's 6 stage RO/DI unit. My question now is, how long should I do my regular waterchanges and topoffs for before even thinking about purchasing any corals or anemones? BTW my next purchase is the 48" Hamilton MH hood from captivereefs so I will have sufficient lighting for corals shortly.

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Old 02-19-2005, 08:34 AM   #2
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I wouldnt say that high TDS would cause a tank to not support corals and anenomes. Remember TDS stands for Total Disolved Solids. Everything in the water thats not pure water will register as TDS. the TDS of an operational tank is fairly high after you add the salt mix, etc. For fun you should test mixed up saltwater for TDS after you mix the water.

TDS is a good way to test your RO unit for performance but I woudlnt use it as a measure for anything beyond that.

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Old 02-20-2005, 08:20 AM   #3
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To know if your water is Bad you really need to have it tested at a lab for heavy metals, PO4, NO3 ect. As stated there are good TDS and bad.
If your worried about keeping corals and anemones I would start out with some cheap hardy corals like shroons, zoos.
Anemones are delicate creatures and should only be put in mature stable tanks so I would hold off on one till your tank is mature, around 8 months - 1 year old.
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Old 02-20-2005, 06:59 PM   #4
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FWIW - i have the filtersdirect ro/di filter and it is great! I also highly recommend captivereefs..........customer service is top notch. I will be placing a order with them soon myself.

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Old 02-20-2005, 07:16 PM   #5
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i bought the RO unit from Costco, IT cost me $170 and comes with the 6 month replacement filters as well as the year replacement filters.

It has a 3 gallon resevoir and if i keep it on over night, it makes about 20 gallons in 9 or 10 hours.
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