Im running two tanks off a air pump that is slowly getting his last legs lol And i went into a shop today and saw a air pump with 4 outlets that does 1500L/per hour and im jus wondering how many litres per hour is a good pump to get to run two tanks? One tank is a 20inch 10g and the other is a 24inch 17g and im soon to be replacing the 10g with another 17 - 20g what would you say is best L per hour pump to run these?