DrTim's Aquatics Ammonium Chloride Solution for Fishless Cycling - 8 oz., Treats 400 gal. – Fish Tank Cleaner for Saltwater, Freshwater & Reef Aquariums

Used this to cycle my fish tank. Worked well and took all the guesswork out of the process.

Dr.Tims ammonia is a great product for setting a baseline for your fish-less cycle. Sure you can go buy a litre of ammonia from the shop but then you need to do a little math to figure out the correct dose for the concentration your bottle contains. Then you have more ammonia then you will probably ever need for the remainder of your natural life. But with doctor Tim’s they have to all figured out for you and it’s consistent and repeatable as long as you can follow directions. The hardest part is waiting for your ammonia and nitrite levels to come down as your tank cycles. Combine this with Fritz 7 or turbo start and you have a fast lane to a cycled tank.

I have a 30 litre aquarium and am totally new to keeping fish. Having tried twice both totally unsuccessfully to cycle my tank with fish, having followed all the guidelines, I discovered you can do the cycling with ammonia ( something the fish suppliers failed to mention when I was struggling with my set up! But we're quite happy to sell me fish). I downloaded the ammonia cycling information from the code supplied with the ammonia solution. It is very informative and explains the cycling from ammonia to nitrites and nitrates very well and once completed you can then introduce your fish. The literature did say after 14 days my cycling took 23 days until I was happy the ammonia and nitrite levels were 0 each day. I then bought and introduced 6 danios...well success and very happy fish. My tank water is crystal clear, I did one partial water change after 19 days. I recommend setting up your fish tank in this way as it is so upsetting to loose fish during the cycling process. It's excellent value for money and providing you carefully follow the instructions you shouldn't have any problems.

Used this and Tetra safe start to cycle my aquarium in 16 days. I followed the instructions from Dr Tim’s exactly. Glad it was affordable too since I couldn’t find anything in stores.

Really nice to have, for the purposes of accelerating the cycling a new aquarium without any animals in it. It lasts a very long time, as well. Provides an ammonia source, essentially food for bacteria, in order to accelerate their reproductive rate. Be sure to read all instructions and guides before you use this.