Yes I meant pea sized. lol.
#1 So if I use the pea sized then I can use an undergravel filter for a brackish tank right?

#2 I never had a brackish tank before. Do they use the same types of filter systems as fresh water or is there something I should know that is different that they require?

#3 If I went with sand instead of gravel what type of filter would I need?

I've decided to make the 44 gallon brackish instead of the 20 long. I would be happy if someone could answer these questions. Thanks