i just got a 55g from petco for a $1 a gallon brand is tetra and heard its not as good as there before brand aqueon...though i dont know never had a tank im new to this hobby..question is do i need to do a leak test and if so how do i go about doing this just fill it up and leave it for awhile or what? also theres a pet store closing and its the last day today theres a stand for $30 thinking bout getting it and the owner said that if i bring my own buckets i can have the gravel that was used in the tanks for $5 a bucket which would have the bacteria in it but wont be able to put fish in it for awhile just piecing everything together how long will the bacteria stay good for without use? where should i look for lighting and filter the the best price for a 55g or is any1 selling any of these items?