There is debris on the bottom... like a sandy muddy layer wriggling with pods.
The algae attached to everything. The plastic side walls first, then PVC, then the live rock, then the pump.
I was so glad to have put in a 2" overflow PVC pipe. The main return overflow got completely covered and clogged with a mash of hair that ran for several feet down the tube. The overflow switch set off the alarm but the passive emergency overflow saved the day.
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Failure isn't an option It's a requirement. 660g 380inwall+280smp/surge S/L/Soft/Maxima/RBTA/Clown/Chromis/Anthias/Tang/Mandarin/Jawfish/Goby/Wrasse/D'back. DIY 12' Skimmer ActuatedSurge ConcreteScape
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