DrTim's Aquatics 塩化アンモニウムアクアリウム 100%天然 – 8オンス (Dr Tims Aquatics 塩化アンモニウム| 海水/淡水/リーフアクアリウム、100%天然、8オンス)

This is the only ammonia source I could find which was specifically intended for cycling an aquarium. I am currently halfway through a fishless cycle (a couple of weeks in) on my new big tank and this seems to be working well - nitrites and nitrates are rising and ammonia is falling... so this works. Obviously make sure you read up on fishless cycling if you're not familiar, but otherwise this seems like a good product and a much better bet than buying household ammonia and hoping it will be safe.

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Perfect for fishless cycling of the tank. Includes a lot of product too so it can used on multiple tanks or setting up a tank again. Very effective at helping add and test ammonia levels in a fishless cycle.

I read to use my fish food to create ammonia for my cycle, COMPLETE LIE. I'd have needed to use 15 cans of it to produce the affect needed to cycle my fish tank. With 4 drops per gallon of this you can quickly produce the ammonia needed to start your cycle. It took 7 days and I had Nitrates and Nitrates and a LOT of them. My tank finished cycling right on schedule thanks to this product. I would have been monumentally screwed otherwise and if you're new to this please heed my words and use this to cycle your tank (FISHLESSLY OF COURSE) because it will save you time, frustration, and lack of understanding what's going wrong. Set up your tank. Use this. Get the right readings for Nitrates. Add your fish. That simple. I now know how to cycle a tank thanks to Dr. Tim. Enjoy this picture of my healthy thriving tank.

Does exactly what it's supposed to. I just set up a 200 gallon reef tank with 75 gallon sump. I dosed the system using the bottles instructions after having added One and Only. I tested the ammonia level the next day and it was right at about 2.0ppm - 2.5ppm. now to see if the One and Only acts as fast as claimed.