Just have to add my 2ct as I'm very fond of these beautiful and entertaining fish as well. I once took over 3 specimen that had been kept in a 2' tank only but unfortunately had to give them away since I have not enough room neither (and there they died eventually, very sad).
They were only 2" and didn't seem to grow much neither, so I'd be really interested as well in how long it takes for them to get to 10" in size?
I kept them on sand and noticed they would do a lot of digging under rocks and wood, so if I ever get to keeping those again, I'll sure go for sand again. Thinking that might also be good to prevent them from hurting their barbles (sp.) when they dig, at least for the tiny ones. I noticed that, if provided with hiding places all over the tank, they would become very outgoing and were seen most of the day even playing around - better than anything on tv!
Anyone feeding them snails? Here, many keepers breed snails in a small tank to feed to their clown loaches. I gave mine snails from the tiny outside pond (no fish in there) occasionally, and they would be gone in no time although they were as big as the fish.
I'm curious as well about if and how they establish a hierarchic order? With the 3 I had, the two biggest ones would start fighting after some months, I had not heard of that before. But might be because the group was too small.
Only have seen full grown clown loaches once yet when I picked up some young fish from a bloke who had lotsa big cichlids in a huge tank, and they made the pair of Oscars in there look small even

I didn't realize at first what they were, my jaw dropped when I finally did. That memory keeps me from getting any, lol. Plus that they are said to get ich easily but can't deal with the med too well. I was lucky though, they were always healthy.
Would love to see more clown loach pics, got any as well Nige and delboybully? (Don't mind me if you posted any already)