Hybrid AIO tank ...what could go wrong?

[CoralPlast]

Hi guys, can you help me see what could go wrong on a setup like this? Like overflowing water, levels too high/low, etc..

Sump will be used only for probes, return pump, chaeto, heater and frags.

 

[Tom nhia]

I dont see any issue appart from the probes and heater potentially being exposed to air if you dont have an ato/manage your ato reservoir.

Are you doing this on a new aio or one you already have?