We switched our Intex whirlpool from chlorine to spabalancer at the beginning of the 2019 season on 28.06.2019 due to the excellent recessions on the net. The pool was filled for 8 weeks last season, but due to the chlorine smell it was only used 4-5 times. I ordered via Amazon SpaBalancer, Ultrashock and SoftWater. Then, as described in your instructions, the individual steps are carried out. So when the water was clear and odourless on the 2nd day, we took our first spa bath and added 40ml SpaBalancer in the evening. The next morning the edge felt a bit slippery and I filled 40 ml UltraShock, in the evening I added 20 ml SpaBalancer, in the morning again 40 ml Ultrashock. When it was clear the next day I changed the filters and we climbed into the pool and noticed a light film on the bottom which spread and the water became cloudy and smelled musty, so we bathed in biofilm. Since this day I put 30 ml Ultrashock into the water in the morning (pool volume approx. 800l). Due to the cooling temperatures and the not quite clear water (but no chlorine smell anymore) we splashed for the 3rd time on 07.09.2019, so not very often. I changed the filter again before (which was full of BioFilm) and we climbed in, this time the water became only a little cloudy, but it still smelled ... not fresh, rather musty. Today on 09.07.2019 I put 40 ml Ultrashock in again and on the floor of the pool, although the pump went through 12h today again a small carpet (approx. 20cm ) Glibber (biofilm) noticed. So far I have only added 20 ml SpaBalancer after bathing. I test the water quality with a 4-way test strip from Intex, the pH-value is 7.2, free chlorine: of course 0; My question is, should I increase the dose of Ultrashock (bottle is 1/3 empty) or add more SpaBalancer that encapsulates the biofilm?
Answer:
There may be problems in the beginning. The inflatable whirlpools very often have a double bottom or a ring bead with holes on the top. The air from the blower is pressed into the water by this bottom. When the blower is switched off, water runs into this double bottom. This water is not filtered and is not replaced frequently. A biofilm develops very quickly there.
And that will be the reason why biofilm is in the whirlpool.
The Ultrashock can penetrate the biofilm and kill the bacteria in the biofilm. This loosens parts of the biofilm. In the biofilm up to 99% of all bacteria live in the whirlpool. The detached biofilm settles as a coating in the filters and on the walls of the whirlpool. The amount of Ultrashock recommended in the water care instructions is sufficient to remove the biofilm but not sufficient to destroy the whole biofilm. Therefore I recommend an Ultrashock intensive treatment. You can find out how to do this here: Ultrashock Intensive Treatment
There is no point in increasing the SpaBalancer-Basic dosage. The SpaBalancer-Basic would encapsulate the dirt, but I don't want that in this case. The dirt would remain in the double bottom and the filter system is usually not very good with inflatable whirlpools. Many inflatable whirlpools have filters with a cheap filter fleece which can absorb too little dirt and is immediately clogged. And with most inflatable whirlpools you can't regulate the filter runtime.
That's why it's better to get out the evidence of oxidation with Ultrashock. Please only use the electronic pH tester to measure the pH value. The test strips are too inaccurate. Use our test strips to measure the Ultrashock content. These are very accurate when measuring the Ultrashock.
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