I think Dave's system works well for him. We've discussed this before, and if I remember correctly, this setup uses a good bit of space. A Nilsen is probably a good option for someone that has limited space.
And a redundant setup that turns power off to the ATO/Nilsen if the tank pH spikes is a good move. I did this after I OD'd my tank when I forgot to turn the ATO off while drip acclimating a new fish. Caught it early, though, so I didn't hurt anything, thankfully.
And a redundant setup that turns power off to the ATO/Nilsen if the tank pH spikes is a good move. I did this after I OD'd my tank when I forgot to turn the ATO off while drip acclimating a new fish. Caught it early, though, so I didn't hurt anything, thankfully.