Collapsing them to make the egg case taller in your aquarium fills each one with air so they all float. You have to weigh them down with a stone.
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
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π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
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Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review