So, my CYA was at 320 due to 2 years of using puks and not having a decent test kit, and CA was at 400ish. Think it was more by luck than judgement that i didn't get an algae bloom before i did lol.
A couple of weeks ago i virtually emptied the pool and filled with tap water, i had to use puks for the 2 weeks i had to wait for CalHypo granules, because its difficult to source liquid chlorine/bleach here, i'm having to go down this route.
Anyway, here are my new figures,
the CYA has risen due to 3 puks! but will lower this now with regular backwashing.
Poolmath says i should be at FC of 9ppm, is this the case even if my CC's are so low? i do realise my CA is going to rise over the summer, but its quite cheap here to replenish, i'm waiting for a guy to get back to me about some 12-14% liquid chlorine, but think i will have to buy bulk to get some, until then its calhypo.