Review on 🐠 hygger Aquarium Single Sponge Filter: Optimal Filtration Solution for Small Fish Tank - 5-15 Gallon by Kristina Davis

I had really high hopes but that's what I get for the price. To be honest, this filter has almost no suction power, I think it cleans something, I just can't judge. I have marimo balls and fibers keep floating in water. not included in the filter. As I don't have any fish at the moment I left the tank to filter and maintain the right temperature in preparation for the fish and a film appears on my heater and things are starting to stick to the glass. I don't think the filter does anything at all.