Re: Copper sulphate victim
Poster is in Zimbabwe, Africa. Do not offer US-based advice!
I'm sorry, but there's very little advice I can offer you, since you can not use the testing methods we recommend, and since I have no idea what sort of chemicals are available to you, nor what equipment you have.
If you tell me, you accurately tested and found your chlorine level to be 0.5 and your CYA level to be 20, I could tell you that you need to raise both, but not how to do so.
Since you have copper in the water -- but don't know how much is still there -- I can't tell you what to do with chlorine. *IF* you still have significant levels of copper, *THEN* you'll have to proceed carefully to avoid stains: most oxidizers (including chlorine) can cause the copper to 'drop out' of solution, in the form of a stain.
Good luck
Re: Copper sulphate victim
PS: your access, as a forum member, to the PoolForum is likely to be temporary. I have most of Africa's IP space blocked from registering, since I have so much spammer traffic -- and very few users we can actually help. You're connecting from a 'new bit' of African IP space, but the first time I have hacker/spammer traffic from that space, you'll end up losing the ability to login. You'll still be able to read the forum, without logging in.
I do hold open the forum for subscribers at the "Supporter" level, but that involves periodic tweaking of the blocks to let them through. However, I don't recommend subscribing for anyone outside of the EU -- we can only offer limited help to EU residents, and even less to non-North American users outside the EU. Too much of pool care depends on what's locally available.
Sorry.
Re: Copper sulphate victim
No problem thanks. Thought pool advice would be generic except for slight tweaks cause of different weather conditions.
Ta
Re: Copper sulphate victim
Chemistry is generic; solutions to chemical problems are specific and market dependent.
But, even the chemistry is indeterminate until you have reasonably accurate test results, and that's one of the things you're missing. Unfortunately, good pool testing supplies are pretty much a US-only product. Palintest (UK) and Lovibond (DE) make some decent testing products, but they remainl inferior, and cost 3x as much (> $300 US). Up until 2002, I could (and did) ship US kits to customers in Asia and Africa, but the post-9/11 security restrictions eliminated air shipments of chemical products of any kind.