AWC interval

[mpderksen]

I am considering finally setting up a DOS water change system for my Apex. Smaller, more frequent changes seem better, but at some point, it is probably just silly, (like a tiny amount every 5 min.). I want to change a gallon each day, or so. Should I split this into once/day, or maybe a quart every 6 hours?
Second, to have a it run for a month, I'll need a reservoir of ~30 gallons, so a 35gal Brute can seems perfect. But the PERFECT place for this would require sitting under my RODI unit, which is about 20-25 feet away. I would run out the garage wall with 3/8" Pex tubing and tie into the DOS meter with a barb connector. Any real problem with that amount of distance? Once it's all primed, I can't see that there would be issues. The drain would go right out the wall into a French drain to the street.

 

[d2mini]

Distance doesn't phase peristaltic pumps, if both pumps are running the same distance. A variance in distance can alter the amount of fluid pumped, so make sure you calibrate both after running your lines.

As to how often, really it's up to you. No significant difference either way.

 

[slief]

Distance doesn't phase peristaltic pumps, if both pumps are running the same distance. A variance in distance can alter the amount of fluid pumped, so make sure you calibrate both after running your lines.

As to how often, really it's up to you. No significant difference either way.

+1.

Calibrate both pumps after you have run the lines. Interval doesn't really matter. When I had my Litermeter III doing my water changes, I was changes out a mouthfull every several minutes for about 4 gallons a day. Now with my Genesis Renew, I change out 1 gallon at a time 5x a day. Both work fine. The advantage smaller but more frequent water change intervals have is depending on your sump size, you will have less impact on sump level which translates to better skimmer consistency and less chance of triggering your ATO.

 

[mpderksen]

Awesome, thanks. My plan was to run them at the same time. Drawing from the skimmer section and adding in the return section. Slight differences in time would be calculated from the actual calibration.