being a dog lover as well,i suggest u go SPCA for adoption,staff there will give u consultation of e responsibility of taking care of a dog/pets.
I dont reely advise u buying one
Actually its depends on budget,if possible try to setup a sump tank,save u frm more expensive-upgrading.
Flow-rate also depending on what kind of tank u try setting up,a mini reef or fish-only tank or anything else.
my 2cts worth.
http://www.channelnewsasia.com/stories/sin.../229720/1/.html
Its all COST COST COST! its all where my taxes goes to!
IMF become TARGETS for merchants instead,rich will get richer,poor will get poorer.
maybe u can search e forum abt prior instructions to b done be4 intro of fish into e tank,take precautions before it happened save u $ n time n yr poor clown.