Review on Lee's Pet Products Undergravel Fishbowl Filter, 2-Gallon - ALE13202 by Dale Mankad

Glad to find these little gravel filters as well as replacement cartridges. I have 3 gallon bettas with filters that draw too much current for large finned bettas. Undergravel filters do a very good job of keeping tanks clean. I would give them 5 stars but I didn't like the little plastic plant. I took them off and replaced them. Note: These filters require the use of a pump and hose. I use splitters and regulators to control the airflow to each tank. I will be buying more of these filters as I get more bettas.