Join Date: Apr 2016
Location: Central New York, USA
It is generally held that RO, RO/DI, and distilled water are all 'too pure' for fish and plants as they derive necessary minerals and trace elements from the water through osmosis. For those water types, we would need to add minerals and adjust for pH in order to use them effectively.
I use my well water that is neither soft nor hard and [still] add about a tsp of Equilibrium per 5-10g of fresh well water.
Unless you have liquid rock or have 'special needs' fish, usually properly conditioned potable tap water is just fine.
Tank On, Mike-
60g Marineland Community, Finnex Planted+ 24/7, Silica (pool filter) sand.
10g, 29g, & 37g fry grow out tanks, 110g stock tank.
What came first, the chicken or the egg. It was the egg, but not the egg from a chicken.
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