hey guys, i am upgrading from a 20 gallon AGA tank to a 30 gallon Finnex M tank sometime this week. i need some advice though on how to transfer everything over. i was thinking of taking like 10 gallons of water from my old tank and putting it in the new one, then putting another new 20 gallons of water in the 30. i also don't know if i should transfer my sand or if i should just buy a whole bag of sand. any suggestions?