thanks that was helpfull, but he didnt mention one other question i need to no can u cut one in half as my pleco broke one of them, but the 2 half are getting on very well.
I split one of mine before. You will probably have to keep pressing it into a round ball for a while though, or you'll see the insides on the side where you split it. Mine always did fine.
easy to keep, add to water and leave, rolling sometimes to keep the perfect round shape, if brken, either keep rolling to make 2 smaller moss balls, or lay the broken side down and it will turn into a moss carpet.