
If you can't tell from the picture my betta is a bit lazy and likes to lounge around most of the day. So any current that exceeds the ripple can actually strain them a bit. I used them to confuse the filter output and they worked great. They also serve as secondary filters and can catch quite a bit of dirt and debris as it re-enters the tank. So I flush them regularly and replace them every few months. Before these sponges appeared, my betta was under constant stress. Now he will live with comfort to old age :)

KEDSUM 330GPH Супер тихий погружной насос с высоким подъемом и заземленным сетевым кабелем - идеально подходит для аквариумов, прудов, аквариумов, статуэток и гидропоники - в комплекте 3 насадки и поток воды 1500л/ч
39 Review

KEDSUM Quiet Rechargeable Battery-Operated Aquarium Air Pump With Dual Outlets - Perfect For Fish Tank, Outdoor Fishing, Transport, And Emergencies
28 Review

Аквал Вентиляторный Фильтр Микро Плюс
35 Review

Powerful And Quiet Submersible Pump For Aquarium, Pond, And Hydroponics: KEDSUM 660GPH Pump With 6Ft High Lift And 3 Nozzles
29 Review

Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review

🧲 Эффективный магнитный очиститель аквариума: KEDSUM плавающая чистящая щетка с ручным дизайном
34 Review

Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review

Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review