@wvned, how is the flow in the 75g FW tank using the FX 4? I am deciding if I need the extra flow of the FX 6 or if the FX 4 is enough. What do you think for a SW reef tank? I am leaning toward the FX 6.
I have never done anything like that on a SW tank. Hope it does what you want. I get about 6-8 weeks on the FX4 and then the flow falls off and I have to service it.
Mine is filled with rings and Seachem Matrix.
I do not think the flow would be significant for a reef tank. The filter has a v shaped return that you can somewhat point. It makes the plastic plants sway back and forth. Thats about it.
I also had to modify the intake to get some surface skimming going.
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