Update: Both my moors are now dead Dont know what went wrong, just hope that my other fish will be alright now.
don't blame the pet store! even if the advice they gave is bad, keeping those fish is your responsibility alone, moreover, you had a year to correct any misinformation and there is a lot of goldfish info on the internet to not know the basics. Start by reading the new goldfish article sticky, it's pretty good and proceed slowly from there.When I first started out with fish I was in the pet shop about twice a week for around 6 months asking questions and getting all the knowledge that I could and it was under their advice that i had 2 fan tails in a 3gal tank and again they told me that i could add several more fish to my 35litre one. I have been acting on their advice from the start so do you think that they are giving me the wrong advice on everything??
I do around a 30% water change once a week, vacume the gravel and do a general clean/tidy once a week. I use the API master test kit and the readings are normally bang on, got an ammonia spike after adding the new fish but it calmed down after a few days.
I am going to go back to the pet shop (Pets at Home) and let them know what has happened so hopefully they can prevent it happening to other customers.