This all seems so overwhelming ... but I am willing to try, however, I can tell you right now, I've no space for a sump as I've used up every bit of space we've got.
Okay, so this is where I'm at. The very first brackish tank I ever had was for my mudskippers, and the guy I got them from was like "mixing brackish water is easy, you just put 2 tablespoons (of marine salt) in for every four and a half liters of water", and I suppose because we were talking about a small amount of water, he never felt the need to explain mixing brackish water any more in depth. And so that's how I've been doing it. However, when I graduated to a brackish tank for my GSP's ... I used the same basic recipe only I would start out the first week by adding 2 tablespoons of marine salt, and then next week I would add another 2 tablespoons .... and believe it or not, that's how I've been doing it. I got lucky with my GSP's when they were in the smaller tank because I got the SG up to 1.012 -- BUT I've obviously failed with my big tank because my SG is only at 1.006 and I know that's extremely low for GSPs and Ceylon puffers.
I do 50% water changes on that tank weekly, and if I don't want to kill my good bacteria, how much salt can I get away with adding? I have a spoon that's exactly a 2-Tablespoon measurement and I know that 2 Tablespoons equals 1 ounce. On my big tank I'm up to adding 34 of the 2-Tablespoon measurements (or I suppose you could say 34-ounces). Left to my own devices I would just keep increasing the amount of salt by 2-Tablespoons each week until I reached an SG that I was happy with, probably 1.015 or there abouts.
Also, PP ... how do I cure live rock? And where would I keep it until I can put it in my tank? Can I do a marine tank without live rock? Thing is, I'm afraid if I put a bunch of live rock in there, it's going to take away from the swimming space for my puffers. I don't want to add anything else to the tank other than making it better for my puffers. So I'm not out to make it so I can add tankmates or anything .... I just want to do the right thing for my puffers.
