Wavebox maintenance

[Mrfish55]

Sorry my visit turned into a make work project for you I take mine apart and clean it up about every six months, my sponge fell apart a long time ago and ran fine without it, I dont know if the sponge is necessary (keep stuff out of the impeller) or if it is to make it fit snug in the box to stop it from banging around and making noise. Thanks for the coffee by the way and your tank looks awsome!