I have two tanks on my desk, one is an 8" cube and the other is an Fluval Spec 16. I'm struggling to get the smaller tank to stabilize & establish, and it continues to get covered in cyanobacteria despite no feeding or other nutrient inputs (coral only in this tank) and using the same water source as the Spec 16. In lieu of plumbing the tanks together, which would be complicated and require drilling, I'm considering setting up an automatic water change to simply exchange some water volume between the two tanks regularly. Has anyone tried something similar or see any reason why this wouldn't work to stabilize and reduce maintenance on the smaller tank?