Originally Posted by fishyd
Say that it's for learning proper time management and care of multiple living organisms. With 2 tanks, gotta be able to manage your time and be able to split your attention between the 2. Sell it as a very important life lesson.
+1 yeah give that a try.
If you can only keep one then why not say your fish are outgrowing your tank and you need a bigger one. Then once the new one has been set up, make your current one a 'hospital tank' and claim its needed.
I remember when i set up my first tank, my mum refused to have fish what so ever, after the 20 the 30 followed then a 65long.then a 55g. So from being told i couldnt have any i ended up with 4. Just bide your time, if you only just set up the tank you have afew months ago maybe its alittle too soon and in time, as you get older they may change their mind.