ok cheers.
anyways i have had another look on the site i was going to get the acrylic from its only £15 but then with postage and v.a.t its £40.
and since i am on a very very tight budget pratically nothing

(iam 17 and about to get a car) , i have decided to have a go with the windscreen repair kit and only fill the tank half up and make a open top palludarium, hopefully that will mean there will be less chance of it breaking because of less water pressure.
thanks for all the help from everyone, i will post pics of when its done and hopefully filled with out leaks.