a sump is anything you want it to be! You can put rock and plants in it. plus a heater, pump, light, cartridge filter,
hob, sponge filter, etc. You can isolate fish, or anything else.The phosphate reactor, that I am using as a canister filter has a 295
gph. pump on it, its worked wonders in only 3 days! I pack the floss tight for finer filtration. No problems so far
