Aw Sef, I nearly took a sledghammer to the whole thing.
To cut a long story short the shrimp thinks its a JCB (literaly) Bloody re-arranged the sand single handedly throughout the night. 5" blooming high some of them piles were. Burried corals for fun. Come downstairs this morning and I always check the tank before heading off to work and boy did I get a shock... ####.
Anyway come home a 10 oclock and got stuck in. Completely gutted the tank to try and catch that blasted thing. Cornered it and it took a further 2 hours to trap it.
Its now in the sump (solitary confinement) The Goby's back in the main tank. I've given the shrimp it own little pile of sand in the sump and it can bloody well move that around all day if it likes.
Lost a bit of height on the right side of the tank with the LR, So I'll buy some more to accomodate that aspect. Its not the same though. But I hope I can get back to where I was in the next couple of weeks.
Bit peeved at the mo.
BigC