Using RO/DI waste water in freshwater aquarium?

[Drfu]

Originally Posted by neoh

So, what's the difference between the RODI waste water and tap water? You should be dosing your macro and micro ferts with planted tanks (Kno3, Po4, etc.) (See: http://www.aquaticplantcentral.com/f...ing-guide.html) anyways, regardless of method.

Whats the TDS out of the tap? What's the TDS out of the rodi waste water?

I wouldn't see it as a problem. I had high tech planted tanks for years, and I would do it if I had both. It's still filtered through your carbon and sediment filters, so it would be much better than straight tap water, as tap water still has chloramine/chlorine in it for the most part.

I would make a batch of water from the waste water, use your prime with it, then dose your KN03, KH2P04, and trace elements in it before your water change.

However; I would do a test beforehand. I've had fish in waste water before (feeder goldfish) with no problem, so it doesn't strip needed elements from water.

Best of luck!

I got a tds meter today, my ro waste water show 220, my tap shows 200 & i tested the water in my aquarium & it shows 247 ppm.

[Drfu]

So i tested my Ro waste water for Gh & kh, both ate between 7-10 drops or 100-200 ppm, is this a bit high for a standard community tank? Again my TDS of my tap water is around 200, mo Ro waste water is around 220