[WGB]

Usually let my tds reading go up to around 10 before changing resin and never had any problems but went to 12 today and checked Windows with low sun shining on them and never seen such bad spotting in my life which was all over glass . All Windows in shade looked fine, was just ones with sun shining on them. Won't be letting it go over 6 ppm in future.

[Jonny 87]

As high as 006?

Keep it at 000 and never worry again. The difference in cost of 001-006 is pennies really.

I've found anything over 005 leaves tiny visible spots.

000 all the way.

[colin purewater]

Always use water between 15-25 never get spotting
Or complaints, I don't  use resin either just straight from ro

[Mick Kent]

i used to let it get to 030 but now soon as it hits 3 ill change, it isnt worth the risk. its the likes of me where i used to let it get to 030 that gives wfp a bad name for not being superior. if we all had 000ppm all the time then unless user error we would all have spotless windows all the time.

[Soupy]

Double DI.

Never use anything but 000.

You won't use more resin than someone who lets it go to 010 or 030 or even 003.

[SeanK]

Why do guys put any sort of spotting down to TDS, Wayne you said it was bad spotting so that's your first clue
you wont get bad spotting with a TDS of 10ppm full stop.
Its either something you have done like not put enough water on the glass to remove all the dirt or its weather related.
I would say its weather related as the air will be full of crap with all the storms lately and landing on the wet glass.

[Soupy]

Why do guys put any sort of spotting down to TDS, Wayne you said it was bad spotting so that's your first clue
you wont get bad spotting with a TDS of 10ppm full stop.
Its either something you have done like not put enough water on the glass to remove all the dirt or its weather related.
I would say its weather related as the air will be full of crap with all the storms lately and landing on the wet glass.

Exactly why you should never use anything but 000.

It's the removal of doubt.

[dazmond]

It also depends on what's in the higher tds water.some water will have more trace minerals like calcium present which would spot the glass.you have no way of knowing so keep it at 000.

[Gerald Ash]

I forgot to test product for a week and had no problems. Tested and found the TDS was 64.
 Some time later had severe spotting on a window in bright sunshine with a TDS of 5.
 From now on as soon as it hits 1 I change resin because the cost of resin is less than losing customer or reputation.

[deeege]

I unknowingly worked with 030 for a day last year. Got 2 complaints and when I checked the windows were terrible. I stick to 000 now but that's fairly easy for me as my tap water is only 030 to start with.

[WGB]

I said 006 because my supplier recommended not letting it go over that. Im near 100% certain it was the tds reading because of the way the windows were spotting, it was literately small spots and run marks all over the glass. The reason i noticed is when i went in to do the insides all windows in shade were fine but when i went round to front windows with low sun (3.30pm) it showed up every last mark. Lesson learnt

[WGB]

I said 006 because my supplier recommended not letting it go over that. Im near 100% certain it was the tds reading because of the way the windows were spotting, it was literately small spots and run marks all over the glass. The reason i noticed is when i went in to do the insides all windows in shade were fine but when i went round to front windows with low sun (3.30pm) it showed up every last mark. Lesson learnt

Ill like to add it was very faint spotting so if had of been a dull day might not of seen it.

Wayne

[SeanK]

I forgot to test product for a week and had no problems. Tested and found the TDS was 64.
 Some time later had severe spotting on a window in bright sunshine with a TDS of 5.
 From now on as soon as it hits 1 I change resin because the cost of resin is less than losing customer or reputation.

Gerard get yourself another D.I. bottle, changing resin that's taking the water down to 1ppm is nothing more than 
wasteful.
Double D.I. is the only way to go if your changing resin at that sort of TDS level.

[Richard Stevenson]

If the frames bleed then it will not matter how low your tds is.

[Gerald Ash]

I forgot to test product for a week and had no problems. Tested and found the TDS was 64.
 Some time later had severe spotting on a window in bright sunshine with a TDS of 5.
 From now on as soon as it hits 1 I change resin because the cost of resin is less than losing customer or reputation.

Gerard get yourself another D.I. bottle, changing resin that's taking the water down to 1ppm is nothing more than  
wasteful.
Double D.I. is the only way to go if your changing resin at that sort of TDS level.

i`ve got a little system from ROman with two  one litre pots on frame. I`m thinking of getting two larger vessels but at mo every spare penny goes into building customer base.

[Soupy]

If the frames bleed then it will not matter how low your tds is.

Of course it will. If the frames bleed and your tds is 000 you will probably get spots. If the frames bleed and your tds is 100 you will definitely get lots of spots.

[Ian Lancaster]

The one factor not being mentioned is the sun.  As spotting is only taking place on the glass facing the sun, this could be the reason: the water is drying off too quickly so rinsing is not so effective.  Try a 'double rinse' - chase the rinse down to the bottom then repeat.

[Gerald Ash]

In hot sunshine I agitate twice, sweep down the glass side to side with brush on glass then off glass straight to top and rinse down doing each pane individually. I do this because I`ve had spotting in hot sun when doing whole window then rinsing.

[Richard Stevenson]

Apologies Soupy, my point is, if the frame's bleed you will always get some form of spotting, the bleeding never stops regardless of tds.

[SeanK]

Wayne I have experienced the same problem today and have a TDS of 000, I cleaned my property last thing yesterday
and in full sun this morning the windows where covered in fine spotting.
The strange thing is when I cleaned them the stormy weather had eased off and there was only a slight breeze, cant
work it out at all.
Cant blame the sun as they where cleaned in cloudy conditions.