Just completed conversion from Baquagoo Mark's conversion and I'm in the process of getting the chemistry lined up. Wasn't sure to post here or in "chemistry", but what the heck
latest set of numbers
FC = 2.5 CC = 2.5 (I know this is a little high but I'm adding bleach each night to bring up to ~10FC)
CYA ~40 (I added some this weekend and will wait to test, this is a calculated number)
TA = 170-180 (depends on how I count) CH = 270
pH = 7.5
So I'm working on getting the TA down. Towards the end of the conversion the pH was holding around 7.2, so I decided to areate for a while to see if I could start getting the TA down. I ran the waterfall pump and air to the spa for about 2 hours last night.
Tested again tonite, the pH drifted up from 7.2 to 7.5 and it looks like TA is holding - not surprising as I assume I'll need more areation.
My question - after I turned off the air and left the filter pump circulating all night and today - I'm still getting gassing at 3 of my 6 spa returns. The spa and pool share the same filter pump, and I'm not seeing the gassing in the pool. I'm guessing there is a fair amount of dissolved oxygen and CO2 which is gassing at the spa jets since they probably have a bigger pressure drop (smaller orifice?) than the pool returns.
Is it normal to have a pool with gas?