Marco Dry Rock Cycling

About 3 weeks ago I purchased 50lbs of Marco dry rock. After reading many threads on this I chose to be safe and cycle it before adding it to my 120 gallon tank that has been up and running for about two years.

The rock has been siiting in a bin where i have added rodi water, a circulation pump and various types of shrimp to cycle with. I also added some nitrifying bacteria to speed up the process. I saw a small spike in nitrites at one point but not a large one.

Presently Nitrates are zero, nitrites are zero, and amonia is zero, is there anything else that I should check before I add this to my main tank?

Thanks for any insight.

 

Yes, you want to test for phosphate, and also check your pH to insure that nothing is leaching out. While Marco (and others) try to provide the best rock, unless they cured it themselves, there can never be a 100% guarantee that it's clean and ready-to-use as-is.

 

I've had about 55lbs of Marco Rocks in my tank for the past 5-6 weeks cycling and so far the PH is at 8.0 so not bad. They look really nice