Oh, I thought I posted that before. Anyway...
Ammonia: 0
Nitrite: 0
Nitrate: 0 (quite a few plants)
pH: 7.0
I also tested my hardness the other day which I didn't post:
KH: 120
GH: 50
Anything out of the ordinary there?
He's back resting in my tree trunk ornament now after eating a bit. One thing I did notice aswell before was he had a huge poo hanging out of his behind, about an inch long. I've not seen this before as usually he only goes when being fed. A sign of anything? Thanks for all your help.
Also I looked at him through a magnifying glass and all the stringy slimey goo had gone. Like I said, it's only when he's been sat around for a while.