I did it by changing 1/3 to 1/2 of the tank 3 x a week. Anyone who feels up to that level of maintenance should also feel free to knock themselves out!
Ok, I see your point. I meant no disrespect. I do a 20% once a week. I use all hikari for dry foods, hikari frozen bloodworms, frozen market shrimp, and frozen smelts. He's in a 55 gal.
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