My rockwool (fire insulation) is slab,not cubes.I use knife cut them into cubes.First,I wash under tap water to let it wet then use salad spinner to let all washing water out ( I found out that if don't do this step,my rw cubes can't absorb the water well !)
Secondly,fix PH to 5.0 and 1ml h202 50% per liter.After 24 hours,the water turns to light yellow,pH comes at 5.5,some lime ducts on my cubes !!
So,my question is what should I do ? Does it wrong with the soaking I did ? Thanks for any input and answer,have a nice day
Secondly,fix PH to 5.0 and 1ml h202 50% per liter.After 24 hours,the water turns to light yellow,pH comes at 5.5,some lime ducts on my cubes !!
So,my question is what should I do ? Does it wrong with the soaking I did ? Thanks for any input and answer,have a nice day