TDS pen information needed

I got given this a long while back and never used it…i just got it out n put new batteries in it…the reading is in MS… does anyone know how much MS it should be for seeding/veg/ and flowering?

This might help. TDS meters use EC to calculate TDS. Manufacturers use different conversion factors so there will be a “range”. You can probably find more information referring to TDS in ppm’s than EC’s, so this might help you find your answer.


Legend. Thanks @Matthew420

1 Like

Np. I hope it helps.

Yeah it did…I also found this…so I think I’m covered now :+1:


perfect! :ok_hand: