I used 150 pounds of it.
Starting the tank with the TBS rock was less like cycling a tank and more like managing a crashing tank.
Mine is a large tank so frequent large water changes were not possible. If you let the ammonia get to high it will kill all the things on the rock. I got lots of sea life and a large urchin on mine. Lots and lots of cute little crabs.
So I used lots of Seachem Prime.
Use 1 capful (5 mL) for each 200 L (50 US gallons) of new water. For smaller volumes, please note each cap thread is approximately 1 mL. May be added to aquarium directly, but better if added to new water first. If adding directly to aquarium, base dose on aquarium volume. Sulfur odor is normal. For exceptionally high chloramine concentrations, a double dose may be used safely. To detoxify nitrite in an emergency, up to 5 times normal dose may be used.
The important part of the directions is the last sentence. Up to 5x normal dose may be used.
8-12-19
picked it up at the airport and put it in the tank. I tried to remove anything I found dead or objectionable in the boxes.
Testing 3 times a day. When the ammonia rose above .5. I added more Prime. Once you do it wont read zero on the API test kit I used anyway. Your new zero test is a funky greenish color that doesn't match anything on the card exactly but doesn't match any of the ammonia readings either.
Did a few water changes of 25%.
8-23-2019
It was going
Still is
Those cute little crabs grow. I have had to remove several over time.
If you are starting a smaller tank I would rely more on water changes and less on Prime to get it going.
