Questions - Need some input

Here is my pH and Temp





Any input?

After last nights horrible storm that produced a 3 minute surge followed by an outage, my Apex display is no longer working. It is lit up and the controller is working as far as I can tell. However, the display is blank. I tried power cycling it a few times trough out the day and have not had any luck. Anyone have a similar experience that has found a fix? I lost a large tree last night and had to take a day off of work to clear the road, so I am hoping that I won't have to buy a new one.

I have a few of these, and this is the largest. Any ideas what it is?

Marc, you mentioned cleaning your over flow out in your recent article...curious if you have heard of anyone using that area as a deep sand bed? particularly in my tank the outlet from the overflows is at the top going out the back, no stand pipe to worry about cleaning and such. At the base of my overflows there is .25 to .5" of mud and bristles and pods. Just food for thought

The plan: 22in tall 6in diameter single chamber reactor(can add second chamber later if wanted.) The reactor has to be leak proof or I will have to add onto my sump which does not have space for it. I will use a mag 7 or 9 pump for recirculation and come off of my return for feed water(may use a small power head.) It will have a probe port on the reactor and a bubble counter.

Few questions:

what do I make the probe holder out of?

I have seen other ...