Ok, I've got it. Done the math. Checked it. Re-checked it. Double-Triple checked it. And then checked it again. I think its right. We'll see.....
Pumps are setup ready to go....
Found a suction cup, so the DC is now functional.
Got out the calibration solutions and did both probes. Moved one controller over to the UG setup.
Only thing left is to check my starting pH when I get up at 3am for work. Things should be degassed enough by then to give a decent starting pH.
Looking at ~8wpg. Think that'll be enough? Or should I double it?
Still interested in a refresher on the original question......