really depends on stock level, type of stocks, if the tank is planted, or not...
Sometimes feeding less and keep light off and cover the tank is good (no plant tank) so fish is not at active stage. No food = no waste. Or once a week feeding mininal is good as well.
Sometimes feeding less and keep light off and cover the tank is good (no plant tank) so fish is not at active stage. No food = no waste. Or once a week feeding mininal is good as well.