pondlife

Wanted bald husband and wife team for chlorine demand research project.

50 ppm boric acid is about 450g for 1500 litre spa according to the pool calculator. Is this the sort a weight we should add?

I bought 25litres for £17.99 of 12% bleach from http://www.iscapoolcare.co.uk/[email protected] Delivery was cheap as I live in Devon. With Chem geek's advice I diluted to 50% and very happy with the result.

I cannot find the figures used in past to estimate how much chlorine per person per hour for clean no beer no costume soak. Was it 7 ppm?

I too am from UK and tried to find a reliable source of bleach. Sainsbury's thin bleach is a possibilty but concentration can be anywhere from 0.1-4.99 % (according to customer services they could not guarantee the concentration). I have sourced 12% bleach in a 25litre container for £17 from http://www.iscapoolcare.co.uk/ in Devon (deliver locally) and diluted immediately to 6% using lots of containers. Half life is a problem with such volumes but we shall see. Using the systems advised by Nitro I have not had to use MSP or superchlorinate as combined chlorine levels remain very low and water quality is impressive.

I use Pleatco reference: PRB50 1N3, Unicel ref: C-4950, Great Barrier reference: 8510, Arctic reference 3905 RS 50 square feet filters and have done for last 18m with no problems. I alternate every 2w and changed after 12m. I clean with filter cleaner if soiled or just soak with chlorine after a low power jet clean. I have had no problems with calcium hypochlorite as sanitiser after CYA for 2w (soft water area). Arctic Spa Kodiak

Kube001 Your rash does not sound like a contact dermatitis as you would have it all the time assuming the same chemicals are always present in the spa. An irritant chemical dermatitis would get worse with the increase in chemical concentration and would not be seasonal. Your rash is worse in the winter. As we get older our skin especially on the lower legs dries out and needs regular at least daily application of an emollient (moisturiser), preferably one that does not contain potential sensitisers (perfumes and organic products and especially lanolin). The temperature of beds can also be problem. Winter is a time for thick duvets and central heating leading to excessive drying. Try wearing shorts in the house to keep your legs cool. The early use of steroid creams or ointments as soon as the rash starts is worth at try. These should be used for a short period and applied sparingly. The above has worked for me and I am able to use the spa every day. (Diclor, calcium hypochlorite and weekly MPS with ozone).

I am using calcium hypochlorite as we have no calcium in our very soft water here in Devon UK. I use dichlor for the first 2 weeks to build up CYA levels. Do any of the UK members use sodium hypochlorite and if so where do they get it from? I would like to change to sodium as I have concerns about calcium build up. PS there are many different units of weight and volume used here. Is there an international accepted definition of a teaspoon? I thought you guys from the US only drank coffee! I am sure the Canadians can empathise. Maybe your "time for change" President will try and get you all the change to the metric system. No, carry on with whatever. This forum as been an excellent source of info for my first year of ownership. Many thanks Chem geek, Nitro et al. Pondlife Devon UK

This is a shade sail Sails use to protect from rain must have a 40 degree angle http://www.shade-solutions.com/

We have had one of the wettest summers in the UK for many decades and if it wasn't for the installation of a waterproof shade sail we would not have had much use of the spa. It is certainly a relatively low cost option to provide a method of shade and protection from the rain. It has a block and pulley system with cleats for easy removal when the stars are out.

The Guardex testing kits are the only ones (under 400 dollars) available in the UK using the drop bottle method (several tablet versions available). Their US web site is rubbish. Do any members have any experience or comments about these kits?

Arctic Spa Kodiak 1500litre increases the water temperature at rate of 2 degrees celsius an hour from 9 to 38.5 took 15hours with outside temperature of about 10 degrees.

Interesting - I have really dry skin myself and have been concerned that spa use might exacerbate the problem - not eczema, just dry skin. Is this something that can be controlled by simply using moisturizers after tubbing? Or should I be more concerned? Thanks....helpful thread It is an uphill battle to apply emollient to potentially dry skin to prevent dermatitis developing. I find twice daily application of a light oil (e.g. Oilatum emollient) emollient mixed with some water applied after showering off after a spa soak just controls my skin. I also have to wear shorts in the house to keep my legs cool. Here in the UK low humidity is not a problem. Currently 100% and 11 degrees celcius outside at present. Thanks for the tip about MPS. I will try chlorine shocks and see if any improvement on my legs. Pondlife