i bought some dried out sand from another member. i have 2 tanks that both have as pristine as i can get it water, meaning nothing is currently detectable (nitrites, nitrates) and they both have a 5 inch sand bed.

i know i can seed the new sand with my sand, but how much exactly would i need? im gonna put about 50 pounds of sand into my new tank. i searched 'seeding' and came up with a few threads, but both had conflicting information.

one said a few cups, the other said a few pounds. should i be safe and add a few pounds of already live sand to kickstart the new sand? i will be putting cured live rock (about 40 pounds) in there as well from another established system.

i should be ok, right?