water is green?

[Frogslegs]

After 5 years of  not too many problems we have just taken off the winter cover and the pool is green. We did 'winterise' it, the same as other years. The pool is 30 square metres, approx 6000 gallons. ph and clorine levels o.k. Have tried Delsalgin 1 litre application, no improvement. Tried Fi-clor superfast fine granules, chlorine shock with pump running for 24  hours. No improvement after three days!

Any other ideas?

[Eslier]

Floculant should clear it and then you just need to vacuum  up the residue, but your problem may be a build up of stabiliser which means you may need to empty about two thirds of the water and refill. I am sure Andrew will be able to advise the best course of action.

[Wils]

PH level OK?

[Baz]

[quote user="Frogslegs"]

After 5 years of  not too many problems we have just taken off the winter cover and the pool is green. We did 'winterise' it, the same as other years. The pool is 30 square metres, approx 6000 gallons. ph and clorine levels o.k. Have tried Delsalgin 1 litre application, no improvement. Tried Fi-clor superfast fine granules, chlorine shock with pump running for 24  hours. No improvement after three days!

Any other ideas?

[/quote]

I had exactly the same problem a week ago with a 7500 gallon pool plus even algae floating on the surface. It is amazing what a strong dose of just choc chlorine does as the water was clear in 48 hours, now all that is required is a good vacuuming. I never worry too much about a strong dose of chlorine as this will burn off once the weather gets warmer, it may well worth just giving it another dose of chlorine as this should do the trick.

Baz

[Poolguy]

Froglegs

Sorry to hear about your problems, the solution may be simple or complicated depending on your systems.

You didn't say what santisitaion system you are using, as a lot depends

on that. Can you tell me what you used to put into the pool and what

product you used to 'winterize'.

Test your water with DPD1 tables for chlorine and phenol red for pH and post the answer and well go from there.

Andrew

[Frogslegs]

Water is clear...good enough to jump in!....albeit freezing cold!!!!

many thanks for the replies and especially to the private email which somehow I deleted...suggesting peroxide. All I did was persevere for a few more days and.... voila!

Now lets hope the sun keeps shining.

[Poolguy]

I would urge anyone to think very carefully about using Peroxide in their pool.

This is also know (somewhat spuriously as Oxigen Actif, but its Peroxide just the same.)

This chemical is particularly agressive not to mention expensive. Some

people report having to spend over 30 euro per week to keep their pool

clean using this product, I do not see the point in this as you can do

a better job with liquid chloring for under 100 euro per year.

There is no question however that it will kill the algea and all the

other nasties that aspect will never be at issue, its very effective,,

but rather that I would warn that the use of this chemical as your

sanisation has to be through through and analysed VERY CAREFULLY. Once

you use Peroxide than you need to nearly flush the entire pool if you

want to change. Secondly that chemical is VERY volitile (exposive), as

evidence in the London Tube Bombings - the major component of which I

understand was Peroxide. Its also very agressive, and reactive with

bleached hair and sensitive skin, so you must be very careful about

your levels.They should be more the 4ppm but not more than 8ppm

according to DDASS Norms.

So its not something to just hurl into the pool to clear up the mess

(like Chlor choc), which it will do very nicely, but the consequences

to the health of swimmers are not alltogether agreeable if its not keep

very tightly measured.

Andrew

[Apero]

Our pool is checked out by a professional at the start of year and we were told, as Andrew said no Peroxide use.

He also said that any lightening storms may cause a change of the water color.