Quote Originally Posted by Poolsean View Post
Bubbles are a normal part of chlorine generation. Most pools have equalized flow or tend to see these bubbles come out of the closest return jet to your equipment. When this jet is reduced in oriface size, it forces more flow to the other jets so the bubbles are less noticable. Its not all cases, in fact most cases, the bubbles are very small and not noticable.
The bubbles are not all hydrogen, some are oxygen.

Question: What size pipes and hp pump do you have? Do you have a pool spa combination?
i would agree, canuck on large mass of bubbles. sean, i have a pool only. the pipes are 1.5 inch except for 2 inch intake and outtake on the pump. the pump is a 3/4 hp uprated to 1 hp sta-rite max-e-glass. i had a true 3/4 hp sta-rite dynaglass before. i did have initially a few small leaks..not enough to show any air bubbles rising from my 2 pool returns but enough to hiss a bit. i patched those on the pvc and all is quiet now, only a few small bubbles in my pump view window. nothing has been changed equipment wise since i installed the autopilot and used last season. the biggest difference really is:

a) i've never ran my chlorine as high as it was running yesterday until i turned it down.

b) the temperature is not as hot outside or in the pool as it was last year given i'm about 1.5 months earlier in starting to run a salt water generator.

ps- i believe i ran my salt level at about 2500 last year rather than 3400-3500 as i currently do so there is likely more "effect" of the chlorine level with the generator than last year to factor in.