Chlorine tablets.

[up2you2]

Previously my Japanese chlorine tablets dissolved with no problem at all.

Now I think with the Chinese ones (Poolchor?), blue flecks, they all seem to go into a solidified mass, not dissolving quickly.

Has anybody else had such experiences, and if so what is now their preferred choice of tablets, performance and cost wise?

[kelboy]

I buy tablet form from a water filter company for m wife to use when I'm not around, I use 90% powder from lazada. Cheap but you just take extra care. 

[Lacessit]

The Chinese have developed an unenviable reputation for shoddy goods. It's a bit like when the Japanese starting making cars for the American auto market.

I'm betting the Chinese tablets are mostly cheap inert filler.

[Bagwain]

The main thing is the check the Cl levels after a few hours in the water. If you are getting sensible readings it doesn't matter how long they take to dissolve.

[Saanim]

I do my chlorination - in addition to the long term algae protection by copper sulphate - once a week (if I don't forget) by a handful of common chlorine (the one without cyanuric acid) thrown in OF tank where from it's slowly taken by pump, distributed into pool. 

 

With this simple procedure I have clear water every day throughout the year.