This is my first ever post to a forum. Hope to get it right. Have followed many before and found a great amount of info just reading daily during my lunch break. Will have a million questions. Have had a 30 gallon oranda tank for 9 years and a 55 gallon fresh community with guppies corys pleco tetras and silver dollars for almost 10 years. My latest is a 110 gallon i picked up the weekend and want to explore brackish. My first question is corys take care of the substrate in my other tanks. If i want to do puffers,bb gobis, dragon goby what do i use to take care of the substrate?