Can you soak Rockwool Cubes to long?

[Dr.King]

As the title reads. I was just wondering if you can over soak rockwool cubes. I have had some rockwool cubes that I have been meaning to use that have been soaking in RO water for 10 days or so now . Are they still good to use or should I re-soak some new ones? Thanks a lot, I couldn't find the answer anywhere online.

 

[aridbud]

Soaking washes out fine particulate matter similar to asbestos. If inhaled while handling dry, it's a lung irritant.

Here's a blip on it...
http://www.epicgardening.com/rockwool-harmful/
If you use rockwool right out of the package, you will likely have a problem once you plant seeds or seedlings in the material. It’s pH is much higher than other media, so it requires treating before it can be safely used with plants. Not only is this annoying and a hassle to deal with, it just slows down your entire process and puts a barrier in front of your growing efforts. Even when you get the pH correct, it can fluctuate much more than other types of growing media. You’ll have to watch the pH levels of your rockwool like a hawk to make sure there’s no nutrient blockage to your roots. The last thing you want is for your media to actually slow down the growth of your plant instead of speed it up.

I think this is a pitch for a different more user friendly product, but suffice to say, soaking....wring out cubes and use.