How much of this are you guys using as a layer in tubs / pvc cages, etc.? 1", 1/2", ? For those using standard sized tubs, how many v70 or 28qt. tubs will one bag do?

I've been using coir (similar to reptichips) and don't love the texture. I stll have a couple blocks to go through before I can switch substrates, but would like to change to something with a finer / smoother texture. I currently am running 6 AP 4'x2' cages, 8 v70 tubs and 5 28qt tubs though, so want something that will not break the bank.