If you can right under the water surface of the return pipe drill a small hole and the nozzles can be under as deep as they want. I have a small hole drilled in my return inside the overflow it sprays a bit of water sideways but it's in the overflow so it makes no difference. On my freshwater tanks I do the same with canister fliters in case a hose pops off or blows then it won't drain the whole tank on the floor
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Murray
I reserve the right to hijack any thread I want to!!
My carbon footprint is bigger than your carbon footprint !!!!
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