Growstones?

Interesting product. Might be worth a try. Unfortunately I can't help answer your question about it but thanks for sharing the link.
I've never had a problem with dust from hydroton so im not sure what you have got going on. Someone should be along that can help you out soon.
 
Anyone use these? How are they compared to Hydroton? I'm getting sick of all the dust in my rez...

work awesome. hold more water and air than any other medium.

you will get a bit of dust after each rinse. on the bag, there are directions on how to prepare before use.

pretty easy to rinse off old roots and re-use as well. i let mine dry in the sun for a day or so and the old roots come right off in water.
 
work awesome. hold more water and air than any other medium.

you will get a bit of dust after each rinse. on the bag, there are directions on how to prepare before use.

pretty easy to rinse off old roots and re-use as well. i let mine dry in the sun for a day or so and the old roots come right off in water.
Easier to clean than hydroton? Because I still get some roots even after I let sit in bleach and rinse
 
I've read some people say it raises pH. Any issues?

no. they are inert. won't affect pH at all.

i do hempy buckets so the more air/water ability is what sold me on them.

i think if you are just using in netpots, they won't be much different than hydroton
 
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