protection grid for your suction hose (aquarium)

protection grid for your suction hose (aquarium)

thingiverse

I use this to protect my shrimps in my 30l nanocube from strong suction while changing the water. - The holes in the sphere/ cylinder are 2mm - ther's a small knob inside to hold the tube in place - three tube sices can be used: 8/ 10/ 12 mm - the sphere is max. 30mm in diameter

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