I did have 4 x 50kg then realised they were 25kg bags lol but I do want it abit deeper so thats why im going with another 2 bags.
Try your media from the 204 and see how you get on, im just doing it my way, right or wrongly its how I had decided to do it with lots of stuff and too be honest it might not make any difference at all but I didnt think it would do any harm at least.
You should see the danios, they must think their in the ocean, they take ages shoaling from one side to the other lol
My fish are already fairly big as they were in the 6 foot tank for awhile but are now going to move on before they get too big.