"first i want to make it very very clear this gravel vax is NOT recommended for tanks under 20 gal, because it is THAT POWERFUL, i currently have a 65 g turtle tank, and i was able to suck up all the turtle poo and the grime and EVERYTHING else, in less than 10 minutes ... it is sooo fast, i would also highly recommend that you use this where you can let the water empty into a sink DIRECTLY or a tub of some sort!!! i mean it, when i first used it today, i thought it was going to go really slow, but, boy was i W-R-O-N-G!!! i put it in the tank and pumped it 2 times and it started right off the BAT!! then, within less than 15 sec the 3 g bucket i was using was FULL!!! so, i had to let the gravel vac empty from my patio, luckly i live on the 3rd floor, so, i hung it over the edge and in less than 10 minutes the tank was already half empty!!!! OMG, you so have to get this thing, itr really SUCKS !! and i mean the bottom of my tank is CRYSTAL CLEAR!!! it has not been that way since i got my turtles, i use to use the hold heave ho bucket for bucket! but, not anymore!!!
if you have any kinf of tank over 30 g then this is the gravel vac for you!! my turtles are very greatful!!!"