Well I don't think I can make that one and only fit in my budget. So I'm going to try instant oceans bio-sprial. Its only about $25 for a 75 gallon dose.
Do have a few questions. Should I use any kinda of airation?
I'm going to buy a saltwater test kit. I liked api freshwater one and decided ill get the saltwater one. But should I get the marine and reef one. Only test nitrite ammo nitrate and ph. The reef one add. Hardness phosphate calcium an nitrate.
For cycling, a cheap way is just to put a raw shrimp or piece of fish into a pantyhose or net and let it rot in the tank. Or you can use liquid ammonia, which smells better IMO. The ammonia is usually less than $5 at ACE hardware. Just make sure that when you shake the bottle, there are NO bubbles. If there are bubbles, then there are surfactants in it and you shouldn't use it. You just add a little ammonia, wait and hour for it mix and then test ammonia level. You'll want ammonia to get to at least 4ppm for a good strong cycle. If its not up to 4, then add a little more ammonia and retest, etc.
The Bio-spira IMO won't make the cycle go any faster.
For air exchange, just have one of your PHs aimed up and causing ripples on the water surface. No airstone of anything like that is needed.
API is okay for the cycle. I used it when I first started, have since switched to red sea tests. But API is ok. If you're planning on having corals, then get the reef kit. If no corals are planned, then the master set is fine. And if you don't plan on corals for a while yet, just get the master kit now and you can add the other tests at a later date.
And just so you know, for the API nitrate test, you need to divide the result by 4 to get the actual result. It tests for ALL nitrates, which most tests don't do. I was driving myself crazy when I used it, trying to get my nitrates down, when they actually weren't high at all.