I have 3 of the AquaTop CF-500UV filters, 2 Rena XP4 filters, 1 Eheim Ecco Pro 2232 (35 gallon) and a Fluval FX5.
The Rena, Eheim and the FX5 are well constructed. The Aquatop has cheap plastic parts that break. The Aquatop does do a great job of filtering for the money.
The Rena is easy to...