[D.Salkeld_Ltd]

What is the highest you would alow your TDS to go for safe use?
Personaly I dont know as I rarely let mine rise above 000.

David

[Easyclean Windows]

when i first started i let it go to 15 max but i was told that was ok by tucker poles (aqua factors) they also treat water so im guessing they must know thats ok

[Count Phil]

I've done them at 20ppm before. Its ok. But only a tiny amount of dirt will raise it to water mark and spotting levels of tds. Best to keep it as low as poss.

[steveaqua]

I've let it raise to around 12-15ppm before and it has let specs on customers windows so now I'm on it to change it as soon as it starts to raise around 4-5ppm for my own peace of mind as i'd like to hang on to my customers. Checked it today still at 001ppm, it has been there for around a week now...strange!

[macmac]

no higher than 4ppm for me 

[Clear Vision]

000ppm for me!