Thank you all for your advice.

I managed to find some information last night on dosage and gave the
fish its white spot treatment. I also ordered an aqaurian testing kit
and looked up info on cycling, thank you so much.

I checked on Shamu this morning, and he was looking much healthier and
it didn't take me ages to convince him to come out from hiding to eat.

unfortunatly when I came home today he was dead. I'm going to continue
with the treatment for white spot for the other fish as the pet shop
said if one fish is showing signs of the parasite they'll all have it.
is that what you'd recommend too?

I'm really upset about Shamu's death. hubbie thinks I'm mad. I really
wanted him to get better.

Katie