Just make sure the salt mix gets dissolved completely before you start adding anything else. Not that it will hurt your rock but your SG will not be true until its properly mixed. I say this because you added the sand and some of the mix could settle a bit.
I don't think I noticed any filtration on this setup. I know its not drilled so are you planning on any type of a HOB filiter, skimmer or maybe a canister? Your probably going to have an issue with surface scum. You can angle your PHs towards the surface to help break it up but in my experience the scum and particulate just clouds the tank. You can add some type of overflow box which leads to a sump or if you don't want to do that you can get something like an Aquaclear 110 or 70 with a surafce skimmer attachment. I use an AC and the attachment keeps my water very clear. You can also attach these to some of the fluval canisters. Just some ideas.
I don't think I noticed any filtration on this setup. I know its not drilled so are you planning on any type of a HOB filiter, skimmer or maybe a canister? Your probably going to have an issue with surface scum. You can angle your PHs towards the surface to help break it up but in my experience the scum and particulate just clouds the tank. You can add some type of overflow box which leads to a sump or if you don't want to do that you can get something like an Aquaclear 110 or 70 with a surafce skimmer attachment. I use an AC and the attachment keeps my water very clear. You can also attach these to some of the fluval canisters. Just some ideas.