Grow Mediums cleaning autopot systems. Is CLR ok?

[lunarman]

Holy CRUD! That is a lot of buildup. When I take apart my tray next time I will take a picture but I honestly don’t think I’ve ever seen it that bad.

Good to have another set of eyes cast on this. I always thought it was bad but didn't have any sort of reference point.

I will definitely start using only RO water now and will be very interested to see the result.