If the control unit turns itself completely off then it may be faulty. I have just set up the chihiros doctor on my new tank and it seems to operate at 15-20sec bursts every 5min or so. I definitely have a high tds (300+) from the tap + EI dosing on top.
Are there any negatives to using the chihiros doctor on a higher setting than intended for your tank size?
Not sure really, i'm using the twinstar too on level 1. I think the difference between the settings is maybe "level 1" comes on more often for shorter bursts and maybe "level 2" for longer bursts less often.Old thread I know, but Im using the twinstar and currently wondering the same thing.
Did you ever get an answer on it?
My logic says it can only be a good thing by increasing amount of O2 in the tank? Just hoping my logic is sound on this and there are no negatives?