First of all I would like to say I'm located in the Philippines and so far my search for a knowledgeable pool maintenance guy has been in vain. Looks like I might have to give whoever this guy is going to be the basic skills to read the pool. The problem is my knowledge is pretty basic. The pool is quite new and so far only Chlorine have been introduced to it. I still need to ask the PB if the Cl he place had CYA on it or not.
So here's the problem, It's an outdoor pool and I need to have the recommended CYA 40 ppm. Calls to pool suppliers either results into... "cya what?!!!" or "yeah it's in a tablet form"... which most likely means it's Cl w/ stabilizer. Sounds like I might have to go this route to get my CYA up to roughly 30-40 ppm. I'm assuming it doesn't have to be exact since we also don't have anyone checking or offering testers for this. Now the Trichlor specs I get is TRICHLORO ISOCYANURIC ACID 90% Chlorine Tablet (200 grams/tablet) 3" dia x 1" thick. If I go for a lower target value just to be on the safe side.... using the Pool Math and plugging 20,000 gals and 40 ppm CYA target. I need 107 oz by weight or 3 kg. But since I'm getting my CYA via Trichloro pucks.... and if Trichlor contains 52% of cyanuric acid by weight, I should need about 6 kg of Trichloro to get correct estimate of CYA. About 30 pucks. Is this correct?
Also if any of the members here are in the Phils know where to get the chems needed then please help me out. No one in the pool building/supplying seems to know anything ....but how to sell.
FYI: so far i've been placing liquid jugs of Cl into the pool. Our Clorox local version here doesn't indicate the concentration so I've just guessed it to be a few % lower than Clorox. So far it has been pretty ok when I check using the 5 drops tester OTO. A jug gets it to the recommended 3 ppm. Unfortunately this doesn't last more than a couple of days.