Yes i know 6025/45 is not controllable but at least it's small .
I've space constraint in my tank, so the smaller the better and neater .
Anyway, i plan to run controllable nano 6055 with either 6025/45 to create better current flow . I'll set it as Day time both running and shut down 6055 at night time with the help of night mode operation activated .
Cost wise will be much much much higher than Hydor Koralia liao !
btw, R u interested ? or any taker ???