Reading this i actually feel sad and it's not even my tank. Hours of time is spent setting these tanks up and gets ruined so quickly. I really feel your pain. I think giving up you will regret in the long run. Take a step back and use this opportunity to start again. Think about what you want and learn from any mistakes you made. (we all have made some we wish we could go back and change) Your tank will soon look amazing again I am sure. it's not as if you are one of those idiots that just adds all the fish and coral a week after setting the tank up and wondering what went wrong. you got unlucky and it can happen to anyone.
Chin up and get that tank looking ace. we're all behind you !!
Thanks so much for your kind words Ash. Yes it is very sad. Unfortunately, I have now lost the last remaining Anthias, one of the green Chromis and sadly, the one with the biggest personality, the red spot blenny.
Out of a total of 18 fish I now have 8 remaining-the 2 Clarkii clownfish, the foxface, coral beauty, Randall's goby, 1 of the purple firefish and 2 green Chromis. Just have to keep my fingers crossed that they pull through.
It has forced me to have a rethink and I have now come up with the idea of putting a fish QT tank in the built in bathroom cupboard which used to house the immersion heater, and then site an RO storage container above where the cold water storage tank used to be. This will then be piped down to the understairs cupboard which will house a DIY AWC unit.
Also on the shelf at the back of the understairs cupboard, there is room for a coral/inverts QT tank, as I have also read that even a mere snail can carry and introduce parasites into the DT despite not being affected themselves.
So next time I will not be taking any chances based on how long the LFS has had the fish or how healthy it 'looks'.
Nothing will be going near the DT without a 10-12 week QT first!
The RO container and AWC will also make water changes and mixing salty so much easier with not having to carry heavy containers down the stairs, hence encouraging me to do them on time and not to put it off til 'later'!
In the meantime, the DT can remain fishless for several weeks. Hopefully the cheato that @i-CONICA kindly donated and reduced feeding of the tank will allow me to get rid of the GHA which still persists on one of my ceramic structures.
Thanks again for the words of encouragement which have helped me to keep focused and not to give up.