Bubble magus dosing pump question

[xmjxflipx]

I have had my doser setup for several weeks now and everything is doing great..

i bought the bubble magus containers and on my buffer/alkalinity line that i use. There is some clumping of the alkalinity at the end of the tubing that starts to build up after several days and i have to remove this clump build up...


does anyone have a similar problem like this and how do you prevent this from happening on the tubing.