Automatic water changes.

[areefer01]

Yes, I did it this way on past tank….

Nevermind @areefer01 beat me to it.

Na, I didn't beat you to it - we are thinking along the same lines Hope your day is well.

 

[rishma]

I always recommend people to do a quick test after calibration. It is easy enough to do.

Actually, this is why I went to an on demand AWC because I couldn’t get the calibration accurate enough over long periods. I could have solved it another way I am sure, but I had a very large new salt water reservoir and the discharge went straight to the drain. The new water was just slightly slower than the old water discharge, and the ATO would make up the difference. Multiple times I went for months without checking and found the salinity low. That’s my fault. The calibration looked good, and my short tests after calibration looked good too. But obviously not good enough to be totally lazy and inattentive.

Anyway, I was more disciplined about double checking salinity when I did it on demand.

 

[Pistondog]

Because i hesrd calibrating it for awc is pretty hard and complicated

I started with dos but switched to versa. Dos 2 years ago was loud, i think they improved it, but the versas are very quiet.
Was doing 1% daily. Stopped a couple of months ago to try no water changes, again.
Versas very easy to calibrate.

 

[Dburr1014]

Because i hesrd calibrating it for awc is pretty hard and complicated

It is really really easy. Not sure who told you it was hard. What's hard is using sensors.

I would, however, suggest picking up a pair of spare dosing heads for the DOS doing the AWC. Always a good idea to have them on hand in case of an emergency.

Avast has a better roller and I only replace the tubing inside the head. I kept the old roller for spare incase of emergency.

 

[deutchriffer]

So I’ve just completed my setup.

I have a 4 channel Versa, I have it set to continuous dose 1.2L per day for both the waste and fresh salt water replenish.

I have a 40L reservoir next to the sump originally intended to use as a fuge.

Both the reservoir and sump have high and low sensors, having used them for a short time I have already got some annoying feedback on them.

The ones I have in my ATO reservoir, gets drips of water from condensation on the reservoir lid and trips the high sensor daily.

When I power cycle the apex for a test, the switches disappear or fail to report their actual state In the first few min of operation and then send the outlets that rely on those sensors into a bit of a confusion, I’ve even added defer statements to help prevent quick changes, but when the module loses connectivity logic goes out the window and it’s anyone guess what state my outlets are in.

I’m happy with my setup, I have a float valve for the ATO reservoir as well as a high switch which is fed off the same line that controls my AWC reservoir, but to prevent it from diluting every time the ATO decides it needs a refill, I have a solenoid that prevents the AWC reservoir from filling when it isn’t supposed to.

When the low sensor is triggered on the ATO reservoir my RODI will start to fill, until the cost stops it and it continues to trickle until
It hits the ATO Reservoir high sensor and then shuts off.

My AWC reservoir will just alert me when the water is low as well as my Versa that is doing dosing forecasting on days remaining, once I get the notification I have set up FeedD to turn on the solenoid and start the RODI automation and then stops when the high level sensor is triggered, then send me a notification to remind me add the pre-weighed bag of salt

 

[Randy Holmes-Farley]

I never worried about trying to match awc flow exactly (and could not adjust it anyway).

If the tank was drifting higher in salinity, I just made the next batch a little lower in salinity, and if it was drifting lower, made the next batch a little higher.

I never had any salinity issue caused by many years of using an awc.