If I read this thread correctly, you added Fritz9 to a dry rock tank about 3 weeks ago but you did not add any food (ammonia, dead shrimp, fish food) that would feed the bacteria, you just added salt water, dry rock( not live rock?), and time?Hi! I did only use Fritz and wait two weeks, but I have tested for ammonia multiple times and there is none as of the tests done Sunday, Monday & today. I mentioned it in my original post, but I know it was a pretty long one. I definitely don’t just count on the badge since they might not always show the ammonia right away, if there is any.
The reason I am asking is that the bacteria need something to eat to promote colonization onto the rocks. That bacteria layer, as it grows and eats the food produces ammonia, then nitrite, and finally nitrate. IF all you ever measured for 3 weeks was zero ammonia, zero nitrite, and now zero nitrate (API test kit? ) then your tank has a weak bacteria layer but not likely cycled to the point it will support fish safely.
You also said you were having a bacteria bloom (the beginning of a cycle?) That is what happens when the bacteria get food normally in a tank start. The water got cloudy? Yes, that was/is the bacteria starting to grow. By changing the water you removed 1/2 of that start but probably helped keep the fish happy for now.
Keep a sharp eye out for another cloudy tank and don't feed the fish more than a flake or two each for the next few days. If you start feeding the fish now you will have an ammonia spike as they eliminate waste products greater than your very thin bacteria layer can process. I'm too tired to write this.
Someone please add a link to a new tank cycling thread.


