Brightwell Aquatics MicroBacter Start XLM - Concentrated Freshwater Nitrifying Bacteria - Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering - Aquarium Water Treatments, 33.8 fl oz

I fed liquid ammonia to the tank (there are dedicated products you can buy). With this it was easy to cycle ammonia to nitrates. I tested the water every 2 days and then re-dosed. The size I bought was enough to continue dosing every 2 days until it cycled. I also had dry rock and live sand, so that could've helped with the speed. Overall, much faster than my freshwater aquariums compared to other brands.

I tried a product from a big store and it did not cycle my tank. This product works excellent however, highly recommended.

After battling dinoflagellates I began dosing 6ml of Brightwell Starter at each monthly watrrchange. A healthy colony of nitrifying bacteria takes up real estate in the substrate which inhibits growth of undesirable algae and protests like dinos.

I have been a Brightwell user fro many years, but this product stands out in their lineup. I have used this to start 5 aquariums now, including 2 systems over 800 total gallons. It cycles the tank quickly and gets it safe for fish. I do not follow the instructions to add fish to cycle. I use an ammonia source, such as Fitz Ammonium Chloride to kickstart the cycle.

We bought some of this for our 140 Gallon system and some for our 20 Gallon Quarantine system. They are quick and do a great job of cycling the tank.

My tank looks healthier. And corals are surviving my care lol

I loved this! SimplyAdded thisProduct and a clownfish toMy saltwater tank and let it cycle!

This is a well regarded product and I would recommend if you can purchase locally from temperature controlled environment. If you live in a hot area during the summer do not buy this from Amazon. The bottle I got did not work at all but I'm also not too surprised. Its been reaching temperatures of 100 here and products in amazon warehouses are subjected to temps up to 100 here which will greatly diminish the shelf life of this product.

Followed all instructions (dry sand, Marco rock etc together with Rapid Cycle from Brightwell) but after four weeks NH3 was still 0.05ppm and Nitrate was only 5ppm. Tank has not cycled in 1 month let alone their claimed 7 days. Have now given up with Brightwell - added live sand and rock and Dr Tims. Hopefully this will work.