12-02-2010, 01:59 AM
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Originally Posted by migdem
I have a 450 litre tank which is planted and I dose PPS-Pro as ferts. The tank has some angel fish, tetras, corys, and some loaches. I do 100 litre water change per week.
The parameters of the water that I throw away is
Now I have another tank in which i have discus in it. The water parameter are
Can i do water change with the other 450 litre water's tank to lower nitrate and PH? or better use tap water with parameters
Please note that I cannot use rain water or RO in this discus tank for now.
Would not use old water for Discus tank. If your Discus are doing OK in water they are in,then tapwater is what I would use. Might perform a bit larger water changes each week and would not worry about 25 ppm Nitrates.