Hey guys . I just setup a 55 gallon the other day , transferred all the filters and media and gravel from a 20 I had and I'm hoping that it'll keep me from having it to cycle it from scratch . Any ways currently I have ordinary gravel in there and I'd like to replace it with sand . So I went ahead and bought a 50lb pool filter sand , since that's what everyone suggests using from other posts lol. And i need a suggestion on how to put the sand in the tank making the least mess possible and what to do to not kill and lose all the bacteria in the gravel . I was thinking putting the sand in and keeping the gravel in bags in the tank to make sure it's fully cycled and then take it out ? That's my first question . Second , i need some suggestion in stocking because currently I have 2 female blue gourami, 5 zebra Danio, and 5 emerald corys. So what I was thinking is to maybe add a small school or cardinal tetra and also an angelfish and some Kuhli loaches? I read some posts and they say the blue gourami and angelfish tend to get along . So in all make it 2 blue gourami 5 Cory - maybe I'll add a few more 5 danio - maybe add more as well 10 or so kuhlis 25 or so cardinals And one angelfish . I think that'd be fair enough if it come to stock , maybe leave out the tetras if anything . Also what kind of plants could I just grow in sand without needing any co2 setups or stuff and for beginners because I never really had much live plants . Any suggestion or ideas ? I really would appreciate it!! And anything else I should know now having a bigger tank would be great !