I have a 65-gal
tank with a sump filter in the compartment below it. I have a siphon overflow chamber that hangs on the back of the tank and takes the water down to the sump. This chamber depends on maintaining a siphon to get the water over the rim of the tank and into the chamber's return compartment. I've been using an AquaLifter AW-20 pump to suck the air out & maintain the siphon. Last night it lost the siphon and the tank started overflowing - big mess. I hooked up a spare AquaLifter and got it working OK, but this one is not sucking as much air out of the siphon chamber as I'm used to seeing - so I fear I'm on the edge of another overflow. I'm undecided between (1) another new AquaLifter AW-20, (2) rebuild kit for same, or (3) another brand of air pump that might be more reliable for maintaining siphon.
And on top of this, my heater died today. It was a Finnex HMD-200 with a remote thermostat that enabled me to view tank temperature and/or change the setting. I liked it, but did have to send it in for repair of its remote sensor 3 yrs ago. I'm wondering whether to order another same model, or to try a different brand. I like having a heater with a remote thermostat that I can use without sticking my hand into the tank.
Appreciate any advice.