It'll be fine. Sounds like in your environment all you need to do is just set it outside for 30 minutes....should be dryer after that.
I replaced perlite with diatomaceous earth in my peat based mix. It is the kitty litter stuff mentioned earlier. Made from microfossils but I am not sure of its sustainability. It does hold up well and works great in a reused soil mix. NAPA sells a 25 pound bag for $9. Part #8822
The major rice producing states are California, Louisiana, Texas & Arkansas. Your proximity to those states will probably determine the availability.Bummer - doesn't seem to be any rice farmers in my neck of the woods.
Replace perlite with DE thats available at NAPA (dry sweep) - lol - Thats just strikes me as strange dude, no offense.
Haha no offense taken. It wasn't my idea it was Al from Gardensweb that turned me on to it. He says it is better than turface. I have been using it for almost 2 years recycling the same soil, the DE does not break down unless you crush it.