Nortembio Pool pH+ Plus 2x1.4 Kg, Natural pH Increaser for Swimming Pool and Spa. Improves Water Quality, pH Regulator, Beneficial for Health.

Works well in my 1100 litre spa, sprinkle two scoops in a nice strong jet and gives a uplift in ph, exactly what I need it to do :-)

Excellent service. Arrived quickly and it very easy to use with the added bonus of the best price I could find.

Purchased this as PH in hot tub was low. It comes with a small 30 gram scoop, to calculate how much is required first measure your PH. Mine was reading a ph of 6, next find the difference from a normal 7.2 ph i.e 1.2. Each 30 gram scoop increases ph by 0.15 for a tub with 1 cubic meter volume, mine is 1.5 cubic meters, therefore divide 0.15 by 1.5 =0.1 then divide the ph increase required 1.2 by 0.1=12 scoops or 360 grames. There is 1.5 kg of ph plus in the pack, so if your ph is low expect to use alot of this product, I ended up requiring 15 scoops of product 450 grames to get my tub to a normal ph of 7.2, compared to other makes of ph plus you have to use alot of this product. The powder is very fine and dissolved easily. Probably better more cost effective to buy a larger pack say 5 kg, as this pack is only 1.5kg and will run out quickly, didnt expect to have to use so much product, but happy my chlorine, ph, and total alkalinity levels are back to normal.

I bought this because I was having some trouble with my PH being too low in my hot tub - whack the bubbles on and throw a couple of spoonfuls in (included) leave a min or so. Bubbles off and re-test gives you a good indication of results. Now my water has balanced I only really need to add chlorine! Great product.

I use this for my hot tub and works great and good value for money

Very good product, I recommend and will buy again.

Sure it does what it needs but wasn't sealed and spilled out when opening.

The PH increaser arrived very quickly and was well priced will definitely purchase more when needed.