I had the bottom of my tank drilled, then I siliconed my own glass overflow, I used a three drain BeAnAnimal style overflow drain so there's three pipes and not much room left for my hand of any thing wide, what's happening is over time a large amount of food and detritus is building up at the bottom as there's no turbulence getting down there. I managed to put a small bio cube pump down there but it's old and wimpy and isn't really doing the job. Should I just try to get a newer small pump and put it down there to keep the water disturbed or is there another way to go about cleaning this decently?