Great Langelier Online Calculator for Balanced Water

[smallpooldad]

Thank you for the reply.

Once again I learnt something new from this great forum. And yes I do have a pool heater as the Tradewinds blow and keep the temperature down.

My plaster pool levels ranges are as follows (depending on my follow up):

CYA 35 (I may have to increase this to keep the liquid chlorine demand down)
CL 5 (3-6) Liquid bleach
Calcium 260 (rising very slowly)
Alk 100 (80-110)
PH 7.3 (7.2-7.5)
TDS 560 (naturally increasing slowly)
Temp 22.5 to 24.5 C (weather dependant)

No algae, but continuing an ongoing fight with with airborne rust (ferric oxide). So per Mbar's recommendation I try to keep the PH below 7.4 with a little metal out, seems to be working well.

A quick question, I use to keep my Calcium at 200 but recently raised it to 260, this for some unknown reason seems to keep the iron from coming back into the pool. Is there a reason for this or do you think some other factor is helping?

I think these levels are ok, please advise if not.