I am 100% convinced that a DSB with plenum is the only way to go. In a nutshell I believe that the more of an ecosystem that we can adapt to a tank the better environment we can provide. Properly managed, like any other form of life it will be a great asset.
But quite frankly there is no right or wrong answer, maybe better informed answers but no right or wrong answer. If someone was to perhaps fund a scientific study of a bank of tanks with and without a DSB over perhaps a decade, then then that would be grounds for a concise position.
I actually currently have SSB in my nano (20 long sumpless) for obvious reasons, but my next upgrade will have a DSB either intank or sump ...
But this project is actually for a FW tank experiment that I want to try, it should also work in FW, hopefully.
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