there is the stock 2 bulkhead fittings behind the surface overflow. That will be the sum intake/tank drain. 2 Durso style drains. Just trying to adapt PVC to the stock Fluval fittings. Seems Fluval made them offsize of standard fittings. I fear I will need some hose couplers and clamps. Is stainless still a nono, in a tank????
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