seriously man...
ur mum its just being kind. as in shes trying to get more fishes for u.
so dun talk to your mum in an unfriendly tone.
although its a "fault" but still... she just being kind. i bet ur mum already "feel bad" enuff after what happened as all her efforts went down to the drain. i dun think shes trying to make u lose interest. infact i think shes loving it thats why she goes through all the troubles on buying some LS for ur tank thinking u will actually appreciate what she did. but then too bad...
i had this experience before as my sis bought home a number of fishes.
like a lobster, seahorse, common clown, ""3" blue tang", 2 damsels for my "2 feet tank"
at first, I was quite pissed as my tank already heavily stocked. but still i understand why my sis was trying to do so i didnt blame her. after talking to my sis about the problem she made, she felt bad enough and stopped buying LS for me already.
anyway,
after a while the seahorse, clown and one of the damsels died.
but for the rest, its already been more than a yr in my "2 feet tank".
its not their fault for not knowing anything about bioloads or reef compatability when they just trying to show some interests to our hobby seriously.
If i were u, i will apologise to her if i lose my temper infront of her on that day.
not telling u what is right or wrong but just let you know on what i will do if i were u. treat it as a reference.
alot of people around us espeically our gf or family members may be discouraging us from reefing because of the hassle and money we are spending on it. but still, after a while, they will try to make an interest in it because ITS our hobby.
takes time, have a good talk with ur mum.
happy reefing, dun get disappointed, just keep going, we are here to guide you
regards,
LaW