So I got a Loland tank vacuum gravel cleaner and I'm not impressed. It worked ok at first but seemed to loose power after several minutes. Also I had to double up the filter bag because it was spitting out particles. I don't know what I was thinking because I usually read reviews but I did the dunce thing and didn't read the reviews first. So what are y'all using to vacuum the waste in your tanks? And is there one you used that was no good?