the problem was she wanted some thing bigger that would be good for community tank and went to the shop not knowing what she was getting and asked the guy in the shop what could she keep with her fish she had already in the tank and the guy swore blind they would only get to 7" max but when i went in today to look at some guppies a lady was asking what she could keep with red bellys and hea told her they can live with tetras as long as in a large tank with plenty of food which me as a newbie to freshwater is not right surely
do you still have a receipt for the fish? By all rights if that was the information you were given then the fish shop has contraviened the sales of goods act. Basically they have not met this criteria
"Wherever goods are bought they must "conform to contract". This means they must be as described, fit for purpose and of satisfactory quality (i.e. not inherently faulty at the time of sale)."
I think you will agree that they are not as described (7" max) and not fit for purpose (too big for you Nan's tank).
take them back to the shop and demand a full refund. It will probably end in an argument but you are fully within your rights. Maybe even take a copy of the act to back yourself up.
