Right now I"m currently raising my paracyp fry in a 10 gallon with a sponge filter.. but the waste seems to remain at the bottom and starts to grow the tiny white rot around it after a day or so.. i don't really overfeed them at all but there are just pieces that fall down there because i crushed my flakes very well.. should i be removing this waste everyday or 2 or it's okay to remove the waste while i do water changes for them every 3-4 days? want people who are very experienced with sponge filter and raising fry using the same format as me to give me opinions please.. and what exactly does a sponge filter do for a tank other than gives it aeration? the internal parts of hte sponge filter.. feel free to give me opinions if you feel like you know exactly what you're talking about.. because i've had some trouble raising the paracyp fry before without the sponge filter and just a bubble machine..