Hey guys I finally had some time to take some pics of the waterchanger idea I used from chompers...
I've almost got it to work...

My 125 gallon with a DIY stand and Waterchanging system that doesnt work perfectly yet.

Prefilter to siphon water out to waste.

Malfunction Junction.... with Valve 2 controlling new water being pumped back into the tank and a check valve on the back end to prevent siphoning back into the new tank water.

Valve 1 controlling water being taken out of the tank...

Mag5 pumping new water into tank...

Orbit Irrigation timer w/ pump control

Pump relay to hook up to timer, so you can control the pump with the timer...
I've almost got it to work...
My 125 gallon with a DIY stand and Waterchanging system that doesnt work perfectly yet.
Prefilter to siphon water out to waste.
Malfunction Junction.... with Valve 2 controlling new water being pumped back into the tank and a check valve on the back end to prevent siphoning back into the new tank water.
Valve 1 controlling water being taken out of the tank...
Mag5 pumping new water into tank...
Orbit Irrigation timer w/ pump control
Pump relay to hook up to timer, so you can control the pump with the timer...
the auto system looks cool, but one good bump from the side and that tank is going down hard. 1000+ pounds of water and glass won't be pretty.