Build up on Alkalinity dosing tube

[Tcook]

I am using Randy’s recipe #2 and using a Neptune DOS. If I don’t clean this off it will eventually lead to a clog. Even happens with the tip underwater. Is it the surface tension of the RO tubing? The sharp end cut of the tube? Wrong tube material?

 

[ShakeyGizzard]

Never seen it that high on the tube before, others should chime in. To me it looks like its splashed or creeping up the tube. I use sodium bicarbonate mix, i get minor build up and since i use soft tubing a squeeze or too breaks off any build up.

 

[Randy Holmes-Farley Verified Community Expert]

I would not recommend having it under water as there will always be a dosing solution/tank water interface where precipitation of calcium carbonate takes place.

Best solution I have heard of is to combine ATO water and dosing water through a single drip tip. I do that for AFR and it works perfectly. Every ATO action flushes out the tip.

 

[Tcook]

I would not recommend having it under water as there will always be a dosing solution/tank water interface where precipitation of calcium carbonate takes place.

Best solution I have heard of is to combine ATO water and dosing water through a single drip tip. I do that for AFR and it works perfectly. Every ATO action flushes out the tip.

Ok. So do you T-in one line into the other

 

[Randy Holmes-Farley Verified Community Expert]

Ok. So do you T-in one line into the other

Yes. I show it in operation here:

https://www.reef2reef.com/threads/randys-tank-and-learn-thread.1103636/page-145#post-14257391

 

[Tcook]

Yes. I show it in operation here:

https://www.reef2reef.com/threads/randys-tank-and-learn-thread.1103636/page-145#post-14257391

I like that method better than a 90• junction. Keeps both lines straight without reducing the velocity. I may stick the alkalinity tube further downstream.