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- Reaction score
- 8
Currently I have a mag 9.5 on my 75g display 20g sump. I'm starting to run more reactors through a manifold. Now I can upgrade to a mag 12 and be confident I can run it without any problem. But I also have the option of getting a mag 18 for not much more. The only thing I'm afraid of, is if I don't dial it back there will be to much flow. What would you do?