An external herbie would support higher flow rate and be quieter at those rates. Asthetically, it is very clean inside the tank but I don't find it as appealing when looking at the tank as a whole. I really like the glassbox look and even considered lily pipes. Will the overflow above cause any problems at low flow rates?
I'll increase the size of the ATO to 4 or 5g. What headdaches are there with gravity fed ATOs?
Thanks beefOrchicken and FishyFishy.
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