I bought a 150L/40g for $20 at a garage sale.
I bought a 60L corner tank and stand 16g for $20 at another garage sale.
both with filters, gravel etc.
Keep a look out at local gS, and on local buy/swap/sells.....
Works out cheaper than dead fish/plants
then sell your jack dempsy, they cost alot in LFS.
and get another electric blue or yellow etc, to keep your buddy happy.