I'm almost positive that there is something in my water that is toxic to my fish. I'm considering getting an RO system. I know that some of you use RO water for your aquariums, and I've discovered that most of the good lfs stores in town use RO. I've read about using something to replace necessary minerals. I would like some info on what size would be best, what brand produces quality water, and the procedure to switch.

I have three tanks right now - 55, 40, and 20 gal. If I'm going to do this I want to buy or rent a system that will give me enough good water for my water changes and drinking/cooking water for the household. It's a big decision and I want to get the right system from the get-go.

Thanks in advance!!

I have had 4 different RO systems over various years. Each was replaced as I found a need for more water or easier function, etc. The most recent setup I have came from APEC

www.freedrinkingwater.com

I have one of the larger systems, for our well water contains some real nasties that we cannot drink or cook with, nor do I wish to wash with it. There are all different volumes of production you can find, here.

One of the things I liked most about these people is that they were up front and practical about water production. Many sites claim max amounts but fail to tell you how much other factors compromise those amounts. This site is correct and honest.

These systems come with very easy to understand directions. I have plumbed mine with a mix of slightly warmed water. The higher temp of water maximizes the volume of RO I can get per hour.

AS far as additives, I find that Kent's RO right works very well as an additive to add extra gH back into the water. I also use montmorillonite clay and Kent's pH stable. Because I use this in volume, I order it in powdered bulk. There are various RO Right, RO elements, ElectroRight, and a few other type products around - so much depends on how you would like to use them and how much you need.

Ro can be very useful in mixing, too. If you have good water - but very high in gH, kH, and pH, you can experiment with a formula of RO water combined with your tap/well water to bring the water to the parameters you wish. I always aim for 7.5 - just like Illinois tap water. That way, when my fish travel, they generally do not need any adjustments made. You will get very good at mixing your replacement water, but do not forget to check your "recipe" every few mixes and to check your tanks after a day or so, just to check that you not only have it right, but it stays right.