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oh and i already have a biowheel and a marineland magnum 350 canister filter that i clean atleast once a month

my UGF is a regular flow with 2 penguin 550 powerheads
it seems to be too much trouble and dirt keeps collecting there and i constantly have a buildup and i don't know whether not to remove it

i've read a few sites that say that when UGF's are in established tanks they do more against it than for it... and i was wondering if that is why the gravel bed gets packed with random bits & etc (...

i have a 55 gal. established community tank.
it's had a UG filter for more than 10 years.
this tank was given to me by my dad, and recently i've been reading up on whether the UG filter is worth...