no, you can use sand. just make sure it's not silica based. south down play sand is a good option, as is estes reef sand.
saltwater is not that difficult. I've seen it done in as little as 5 gal. just cycle the tank.you can use black mollies if you acclimate them slow.skimmers are a great idea but not a must if you keep up on routine maint.live rock is the way to go if you can afford it.and if it's gonna be fish only, keep your stocking levels lower than you would in freshboredcpl said:i have never had a salt water tank and i am curious to try...i have a 40 some gallon hex with sand in it and was wondering if it would make a good salt tank..what is the smallest tank that you can safely use for saltwater..and besides filters and heater what else would you need for saltwater tanks.
leviathon13 said:saltwater is not that difficult. I've seen it done in as little as 5 gal. just cycle the tank.you can use black mollies if you acclimate them slow.skimmers are a great idea but not a must if you keep up on routine maint.live rock is the way to go if you can afford it.and if it's gonna be fish only, keep your stocking levels lower than you would in fresh
they have all kinds. the most popular i think are 29, 55, and 80. they have 10 & 5s, but i don't see them often.boredcpl said:and what size hex tanks are there.. i have 2 and i dont know the exact gallon sizes.