Help with lowering pH
I have both apistogramma agassizzi and discrossus maculatus that both prefer acidic water in order to breed. My question is, how to lower pH? I know there are several ways, ranging from RO water to using peat moss in a filter, but what will help me the most?
I'm unable to get an RO unit cause I don't have the money for it, and I thought about it, but I want clear water instead of tannin leached water.
Any other ideas?
I was thinking of using distilled water, but I'm not sure if I can fill a tank full of just distilled water.