Greg's 75g

[gregzz4]

The Tunze ATO started acting up
It has been giving me the 'wet internals' alarm
There's no way it got wet, but I took it apart anyway to ensure there's no moisture inside it. None.
So, I've done 2 things hoping to solve this issue;
First, the ball valve from the chaeto tank was not sensitive enough to get the drain level perfect. It was sucking air intermittently, filling the sump with bubbles.
Possibly those bubbles were upsetting the optics
The ball valve was just replaced with a gate valve
I've gone from this ( blue valve )



To this



The other thing I've done is move a relay away from the Tunze Controller, just in case an electrical or magnetic field was the issue
From this



To this



Only time will tell now if it's resolved

[Nano]

Now your the one with ocd

[gregzz4]

Lol, ya think ?
Seriously though, the ATO warning was going off a couple times a day
It don't work so well in that mode

[gregzz4]

ATO tank pic
I may unplug the heater - haven't decided yet
Looks like I'm using about 1g/day, so I'll get 8 days before the pump is shut off
The upper float kills both the powerhead and heater, and the lower kills the ATO pump
The relays in the previous pics are for these 2 floats

[FishyFishy!]

Originally Posted by gregzz4

ATO tank pic
I may unplug the heater - haven't decided yet
Looks like I'm using about 1g/day, so I'll get 8 days before the pump is shut off
The upper float kills both the powerhead and heater, and the lower kills the ATO pump
The relays in the previous pics are for these 2 floats

Man, when I get to this stage in my build imma have to ask you some pointers on the float switch's. I want to rig a few to cut the return pump in the event of a blockage. And the same in the ATO tank.

Everything's looking fantastic. I thank you for having such a detailed build thread. Theres a lot I can learn when my sump room build is under way. I will have 6 tanks total plumbed into the same system, much like yours.

[gregzz4]

No problem, whenever you're ready send me a PM

[tang daddy]

May I make a suggestion, no need for a heater in the ato as it adds small amounts of water to the system at various times. Cover up the ato resevoir and add an airstone to circulate/aerate/agitate the water. If you dose liquid supplements you can add magnesium and alk to the ato and it will act as a doser. To cover up the ato tank you can use plastic sign board, easy to work with, make cuts for tubes, plugs, hoses. I found a sheet of 4x8' at industrial plastics for cheap, you can also use it to cover parts of your sump. Since covering my sump I have lost 25% less water than when I didn't. My sump has a middle refuge which I used glass the rest was the sign board.

Nice progress btw, are you adding sand or is it BB?