I have a great version! Haven't had any problems and it's a heavily stocked tsnk, home to smoldering tetras and a few other small fish. However, the new one isn't that good. I filled it to see if it would hold water and let it sit for a day. It held up well so I took it to my room and filled it with water, sand and lava rock. Last night I came into my room and walked across the water. I thought maybe water got into the air pump. No, everything poured up from the right rear corner. Would recommend if you can get a good one, if not I wouldn't risk it for $50.
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