You will not kill beneficials with too much water changing, as long as your tank is fully cycled, and filtered, there are always plenty of excess nutrients in any closed system to go around.
I normally change 40% every other day,....... even when I had a thousand gallons of tanks.
My goal, was to keep nitrate at 5ppm or less, and even with that amount of water changing the goal was not always reached.
Most pro aquarists I know have daily, automated, water changers and do more than water volume than I do, some breeders up to 90% per day to get maximum growth.
I normally change 40% every other day,....... even when I had a thousand gallons of tanks.
My goal, was to keep nitrate at 5ppm or less, and even with that amount of water changing the goal was not always reached.
Most pro aquarists I know have daily, automated, water changers and do more than water volume than I do, some breeders up to 90% per day to get maximum growth.
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