hello, im new to the fish tank scene. i started with a 10g for goldfish and im suprized im not in jail for murder. After doing alot more online reading i relized what i did wrong and made it up to the fish by making it an xtra nice tank for them lol. Goldfish got boring so i bought a 29g and cycled it correctly ( no deaths ) for my 8 cichlids. everything was perfect but being a college student i got way to much time on my hands besides sitting and watching fish. so i decided to make a saltwater tank. im goign to start small. The saltwater is going to go to the 29g after i buy and cycle a 75 for the cichlids. well i read on another site that i should fill with water. then remove the chlorine then salt to the correct standard, then add sand and let set for couple days to let everything settle. WELL then i came to this site where everyone seems to know alot more of what to do and how to do it and i did it very wrong. 2 questions. im going to cycle with dead shrimp but did i mess it up with the sand? and do i need to cycle it with a rock in it or is the rock somthing i put in later after the cycle is complete? at the moment i have a backside small filter running. no heater. ( water stays bout 71 right now. will buy heater in about a week.) and prolly little over 3" of sand. ( to much sand? or is there such thing as to much sand?) ty for any answers. and i will continue to read the forums. just thought i would through another situation out there for some eager answerers!!