If you haven’t picked up the dog poop in the yard for a while, you’ll first want to get a doggy dung picker that will save you both time and manpower. reply #5 Best Dog Poop Vacuums 1. Fish poop does break down and is consumed by beneficial bacteria, snails, and detritus worms. Either way, I figured there was no need to clean the gravel, especially with a vacuum cleaner. Fish tank gravel cleaners are designed to remove detritus like old food and fish waste from the gravel or sand in your aquarium. LONDAFISH Electric Fish Tank Vacuum Cleaner can be the perfect solution for you if you seriously want to suck up all forms of residues and dirt in your aquarium. Removing such stubborn pollutants is facilitated by the aid of aquarium vacuum cleaners, costing less effort and prolonging the time one water change and the next. But, just because that natural process takes places, doesn’t mean you should ignore an excessive build up of fish poop and other detritus in your aquarium’s gravel or substrate. Avoid any dog poop scooper that will hold only a pile or two before asking to be emptied. They suggested they’d help break down the fish waste into more easily usable fertilizer for the plants, as well as addition snacks for the cories in there. This unwanted debris could be uneaten food, fish poop, dead plants, or other toxic materials that you can’t possibly leave inside the tank to contaminate your fish surroundings. They can be as simple as a siphon and hand pump or as high tech as an automatic vacuum that are battery powered rather than manual. Of course, I was about 11 years old at the time, so you can forgive my ignorance about these things. Aquarium Fish Tank Cleaning Kit Algae Scrapers Set 5 in 1 & Fish Tank Gravel Cleaner - Siphon Vacuum for Water Changing and Sand Cleaner(25-65 gallons) 3.8 out of 5 stars 400 $15.88 I’ve had them get into my own substrates in some of my older tanks, but I had just vacuumed them out, assuming they were harmful in some way. I certainly didn’t know much about using a proper type of aquarium gravel cleaner like a fish tank vacuum. This product is designed with a tough suction power capability that is why it is capable of working equitably quickly. Ok, just vacuum it out, you never need a new tank because of poop, oh and mollies need a 20g when full grown, you should get a API master test kit and prime water conditioner. Pet Power Products Pooch Power Shovel.