i've got a 28g bowfront with an overflowbox (hang-on), and a really nice metal halide all-in-one fixture hooked up to an IceCap 250 electronic ballast

i want to upgrade to a slightly larger tank because i have caulepra that is taking over all my rocks.. ive been thinking about a 55-75g tank. i talked to my lfs and he said i could trade my tank, lighting, and livestock in for 300 credit and pay the difference for the 75 with stand

my friend said i would lose too much money and not to bother with him.. the lfs owner knows hes not getting the tunze 6025s, the octo nw150, iwaki return, sump, phosban reactor

should i just buy a 55g rr myself, reuse the equipment and use the lighting temporarily until i scrape some money up for a T5HO and sell what i dont need?

or should i do a trade-in for the 75?

what bugged me was i told the guy i would sell the 6025s for him if he dropped the price down which was like 160 left over for the difference, but he said hed give me 10 dollars for each, ha...

im in college right now so im not really into wanting a large tank. what do you guys think i should do?