Think i got everything sorted out. Did a ahh-some cleaning 5 times.
When testing i got the folowing:
CSI -0.32 (poolpal app)
LSI -0.15 (poolpal app)
One thing that concern's me is that that the sub is using FC even with no bath load, appr 6ppm/24h.
Water looked sparkling clear the first 2 time's now a little bit misty, just liked very small particles are floating around. Could be because filtering is 2x1 hour, thinking it is getting colder and the tub has to heat up which would equal out the reduced filtering scheme, perhaps not. Filter is clean and 25m2 type. I could try a 50m2 filter but not sure if this would clear up the water.
btw the spa looks anyway so much better than before cleaning and using aquafinesse.