Day 1.
Fish tank. Decent. For that price,seriosuly can't complain. The qc is not quite there tho. I think I bought a second batch with reinforced silicon on the sump sections. But due to the extra silicon thickness, the media tray that is supposed to come with this tank can no longer fit. What does rainbow do? Throw in a mesh bag of used ceramic rings instead. Yes. USED. The whole thing smelled like pee. Way to go rainbow. But you make a cheap and good tank for the money so I forgive you.
With no need for a media tray, I bought it anyways. The close competitor to this choice was ocean free. But the design of the ios was weird. It had the underflow bypass all stages and goes back to the return pump. Beats me. Rainbow wins.
Substrate.
Sand goes in. Caribsea website states that's ocean direct oolite live sand is 0.1-1mm. That is incorrect. It has rocks, stones and seashells in there. Polyart uncle warned me but I bought it anyway.
So if you're fussy about your sand, buy arag alive Bahamas live sand instead. That is the truly ultra fine grains.
Water goes in. Quick review of revoreef salt.no complains here. Cheap and good? Tested for phosphate and nitrate. Both 0. Good enough for me. Was easy to mix which was a plus.