how much lr do you have? i would take the sponge out or at least boil it and clean it. i have the ac 70 and i just keep lr rubble and i put in carbon once every 2 months maybe. i would also suggest you put some cheato in somewere even if its in your dt for a little while the macro will eat the nitrate and cheato doesnt root in anything, so you can justpull the ball out when you get it under controle.
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