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Helping out a local school and a good customer...33,000 sqft Blue and green outdoor tennis courts (5 courts 2 are bad with clay runoff lots of mildew too) I have 10 GMP @ 3000 psi at 200 deg hot water. Tried just hot a house wash mix 1-4 water (Power House) - not much help (Black x jet) Tried Lemonene 33 g = 1.164040744 oz to 3 gal water Stepped it up to 77g = 2.6 oz to 3 gal water. I am not winning fast - hot water with green tip and also tried turbo nozzle (faster but will lift any loose paint - who can help. Sent from my iPad using Tapatalk

Sometimes I use a truck wash detergent after the bleach mix. I feel it loosens up any remaining dirt particles trapped in the textured surface. Also try a deck brush in the run off areas. Good luck and send some before and after photos when your done Sent from my iPhone using Tapatalk

Thanks Rod - I appreciate the advice - I have an 18" Steel Eagle with recovery. 4 jets but not adjustable height. I will get some 40030 to reduce the pressure or 40040 so I dont kill the surface. I also have a 28" MTM surface cleaner with 2 nozzles (but no recovery or height adjustment either) That is part of my plan for the next attack as well as a strong bleach house wash. The school is trying to get me more water my 150 gal reservoir is taking 40 min to fill - at 10GPM I burn thru that really quickly. Thanks again Rod Sent from my iPad using Tapatalk