Should i buy the 150 gallon or 180 gallon, salt water or fresh water?

as i was saying should i buy the 150 gallon or 180 gallon, salt water or fresh water i already have a tropical 10 gallon and a 55 goldfish tank 4 goldfish i was going for the 150 but then i seen 180 if i spend the extra 60-70 bucks i got a 180 gallon prices 150 for 349.97(reg 600.99) 180 for 399.97(reg... show more as i was saying should i buy the 150 gallon or 180 gallon, salt water or fresh water i already have a tropical 10 gallon and a 55 goldfish tank 4 goldfish i was going for the 150 but then i seen 180 if i spend the extra 60-70 bucks i got a 180 gallon prices
150 for 349.97(reg 600.99)
180 for 399.97(reg 700.99)
should i just go for the 180 and put my tropical fish in it?or should i just save somecash and get the 150 like i said you all chose for me dont ask well whats you budget blah blah blah and yeah which ever you say to buy please tell me all the stuff i will need and how much it'll cost thanks
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