I use a canister filter setup outside the tank a pen-plax 500 cascade, my tank holds ruffly 3-4 gallons, i clean the filter once a week. just as precaution. this week im probably going to let it go, water is clear, no algae. sub straight does clog the basket at the end of the tube. i use a small net to just shake it off an fish it out. my girl is swearing she saw a small water vacume , runs on batteries. to just suck out the sub straight quick..ill let ya know if we find one.






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