Purchased for a rimless 10 gallon aquarium but couldn't use it so I placed it in a 20 gallon porch "pond" as a secondary filter. It's a little work horse that is able to hold a pack of my preferred media. I'm not using the carbon filter it came with. I like the vertical spray wand returning a gentle flow. Doesn't blow the minnows away with the current. Four stars because it's very, very difficult to open for maintenance.
Easy set up and seems to work pretty well especially for the price
Bought this for my planted community 40 breeder. It had a really large sponge filter and small hob filter. Took off hob filter and set the zoo med canister 30 up. Wow the differance in water clarity. This is a great low cost canister filter
Setup on a fresh 5.5 gallon nano tank. Quality is even better then expected! I would recommend!