Hi and thanks
I have approx 10kg live rock. The damsels are in a breeder box in the tank, I can look at rectifying this tomorrow if he's still with me.
Came home tonight, ready to do a water change in the morning. The Valentini was hiding behind the rocks again looking sad but normal colour. We had some green algae on the glass (have been away 48 hours with neighbour feeding) which I brushed off into the water. An hour or so later I noticed the Valentini was now up in the top corner of the tank looking a funny shade of greeny/grey
Have done an immediate 10% water change as that was what I had ready to go. Am preparing another 20litres of water for the morning. Apart from the algae (which appeared around when he was first ill) the water is testing fine. Although I've been using test strips,I have a decent kit in the post and the LFS have been checking the basics for me with their kit until mine gets here. They agree it looks fine.
The damsels are only small, maybe half an inch (valentini is at least twice their size), I've only ever seen them follow each other round and not near the puffer. This makes me think perhaps its a water problem I'm missing rather than him being stressed. That said, we do have a cat? Never seen him dive at the tank but he does like to sit and watch them swim round, if he'd gone up to the tank quick it could have startled him? I'm clutching at straws here lol
With the colour he is now I'm not holding out much hope. I can't see anything obvious on him, its just the lethargy and now the colour change. A couple of times in the last week he's seemed to perk up a little, swim about and eat, but then it's not long til he's back hiding behind the rocks.
Thanks again everyone. This is such a shame after he started so well