I'm thinking of adding some rock to my system, but I'm not sure if I was to go with cured LR or dry rock. I'd like to do dry rock, mainly cause I've found a few nice pieces of the stuff around, but my main concern is curing time. Can I just toss it in the system as is without too much effect, would cured LR be better for this...? There's about 150 lbs of rock in there now that's been in place for the life of the system and then some.