30gallon to a 75-90 gallon change

[keithgall06]

hello my name is keith i have a 29 gallon with 1 tiger barb 1", a black shark 4-5" and a Platinum Gourami about 4-5' i also have a black ghost knifefish. i have im in the tank before but when i put the worms in the tank they would all let to the bottom and jsut sitt there 4 a long long time he wouldent eat them and it polutted my tank :mad2 . then i had an old 10gallon with no rocks and i put him in there by him self and hes doing fine but i no he gets realy big and i was planning on gettin a 75-90 gallon tank. but i was wondering if i could put sand in the new tank when i add all the told fish i was planning to add real plants and a pleco would the sand be o.k for the pleco and the plants? and i would have alot more room what else should i put in the fish tank to make it more eye friendly fish, drift wood, big rocks, alot of plants? plz i need help
:bowing: :bowing: :bowing: :bowing: :bowing:

[StreetCypher]

plecos and plants with sand will be fine.
Driftwood, rocks, plants sounds good. Your BGK would appreciate a tube to hid in as well. Or you could lean a piece of slate against the wall so you can see it.