MicroBacter Start XLM - Concentrated Saltwater Nitrifying Bacteria - Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering - Marine Aquarium Treatments, 8.45 fl oz

Keeps the tank in good shape

This will always be my go-to from now on. Works like a charm

This is a great product I used to start my nano reef aquarium my tank cycle in 10 days with living sand and a couple pieces of live rock. I highly recommend this for anyone starting a new tank

I used this product to speed up my fish tank cycle. It did a good job and dropped Amonia to zero really quick

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.

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

I used this to start a new tank a year ago and was pleased with the results. Biofiltration is the most important to reef success.

This established my NEW 75 gallon saltwater tank in 2 weeks. I did the full dose as bottles recommends for the first initial dose, and did partial dose per bottle recommendations for repeat dose a week later. I tested the water daily. I do highly recommend.

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.