How long for muriatic to take effect?

[BillyBumbler]

Thanks. In other words be patient and don't try to get perfect water overnight, lol. Anyway when you mentioned the sequestering agent that raised my eyebrows. The company that applied the pebbletech is having me add a sequestering agent once a week from a gallon jug that they gave me (8 oz. per 10k gallons weekly). It's active ingredient is phosphonic acid (I may have spelled that wrong, I'm going from memory). They tell me I need to do this forever and buy the sequestrant from them. My plan was to use up the gallon and quit there.

[aylad]

I would check for metal content of your water before you start pouring regular doses of sequestrant in your pool.......

Janet

[waterbear]

The only reason that you would need to do this is if your fill water has a high metal content. There are a lot of different metal sequesterants on the market and most of them are based on a phosphonic acid derivative. Get your water checked for metals (usually copper, iron, and manganese). If there are metals in your fill water then you probably do need to use a sequestering agent on a regular basis. Not that big of a deal really. They are probably having you use it right now since fresh plaster might be a little more prone to staining. I have a fiberglass pool and the builder had me use one when the pool was first put into service. Whether it was necessary or not I do not know. I fill with softened water from my whole house filtration system and there are no metals in my fill water. From people I have talked to about when their pools were built it seems to be a commen practice among pool builders to add a seqeustering agent when the pool is first started. Some of these products also bind up calcium so it might be part of the curing process for new plaster. I really don't know for sure.