I would get the best skimmer that you can afford. The bigger the better. It help but you don't need a skimmer. Water changes. Not during the cycle. Leave it alone untill it is done. If you are cycling the tank and curing your live rock at the same time then that is a little differnet. As for salt, It up to you. For a non reef, I really don't think it matters. If you can avoid using tap water I would. I know it is hard starting a tank but I use catalina water. Ready to use. It is straight from the ocean. ***** sells it but you can get it alot cheeper at LFS if they carry it. If you are mixing the salt I would just let it mix for a day with a powerhead. I hope this helps.