Dr Kynes
Well-Known Member
Another thing I found helpful was to ditch the tray and set the cubes open on a paper plate on top of the heat mat. I used the wax coated paper plates too so they wouldn't get soggy. I had a small 3" mini fan positioned 2ft above the box blowing up at a angle above them to circulate the air. If you use a fan make sure it's pointing up and away from the cubes or they'll dry out too fast. Lastly I found out that it's a good idea to "fling" excess moisture out instead of squeezing the cubes. Cup the cubes in your hand gently and sharply fling your hand up and down to remove the excess moisture. It's best to do this in a bathroom where you can fling it into a shower or bathtub. Your hands should form a claw shape with the bottom of the cube facing outwards. Peace
go to home depot store and buy a sack of masonry sand.
a layer of sand ~1/4" thick on the bottom of a 9x12 cake pan or similar metal dish will allow heat transfer, and drainage keeping your cubes from sitting in their own excess water and growing moulds and fungus.
you have damping off problems, keeping your rockwool cubes in contact with a nonpourous surface will only exacerbate the problem.
Sanitary Conditions, Low Humidity and Drainage will reduce the problem to manageable levels.