Brightwell Aquatics MicroBacter Start XLM – Concentrated Freshwater Nitrifying Bacteria – Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering – Aquarium Water Treatments, 16.9 fl oz
$41.26
Price: $41.26
(as of Apr 11, 2025 12:03:23 UTC – Details)
Brightwell Aquatics MicroBacter Start XLM Experience a new level of aquarium care with Brightwell Aquatics MicroBacter Start XLM – the ultimate solution for achieving a balanced and thriving aquatic environment. Our concentrated formula is designed to establish a new nitrogen cycle or boost an impaired one, ensuring the rapid establishment of biological filtration and creating a stable habitat for your aquatic companions. It’s particularly useful for new startups, resulting in tank cycling in 7 days in most cases. Also useful in emergencies or after medications to re-establish damaged bacteria beds. This advanced blend works effectively to break down nitrogenous waste, keeping your aquarium water pristine. It is meticulously formulated to enhance water quality and eliminate ammonia and nitrite spikes. Whether you’re setting up a new tank or maintaining an established one, MicroBacter Start XLM is your go-to solution. Its versatility extends to marine and brackish aquariums, providing powerful support for a diverse range of aquatic environments. FEATURES AT A GLANCE Super concentrated 15x strength formula Useful for rapidly re-establishing nitrification bacteria in case of an emergency Usually cycles in 7 days Ideal in aquaria with high population densities and when adding new fish Best used post-cleaning of rocks and surfaces or after use of medication Prevents “New Tank Syndrome” Supplied in a proprietary base for maximum longevity Formulated utilizing extensive data compiled by microbiologists AMERICAN-MADE EXCELLENCE Trust in the quality and excellence of Brightwell Aquatics, an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently strive to deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium.
Package Dimensions : 7.95 x 2.44 x 2.28 inches; 2.2 Pounds
Item model number : BACSTARTXLM500
Date First Available : December 4, 2019
Manufacturer : Brightwell Aquatics
ASIN : B082BX69CW
Country of Origin : USA
HIGH-POWER TANK WATER STARTER – MicroBacter Start XLM is a powerful 15x concentrated blend designed to kickstart biological filtration in new and existing saltwater aquariums. It enhances water quality, providing a flourishing underwater environment with live, non-pathogenic microbes
RAPID WATER CYCLING – Optimize your aquarium’s health swiftly with this fast-acting supplement. Quickly accelerate the tank’s beneficial nitrifying bacteria colonization rates for balance and stability in just 7 days in most cases. It’s the ideal solution when time is crucial
FOR HIGH-DENSITY AQUARIUMS – A scientifically blended formula that assists crowded tanks and effectively reduces ammonia and nitrite levels, all while supporting population density. Supplied in a proprietary base, providing maximum longevity in shipping and in your aquatic ecosystem. Shelf stable for over a year at room temperature
ADVANCED TANK RECOVERY – Perfect for all levels of aquarium enthusiasts and compatible with various sand and rock substrates. Also best used post-cleaning or after use of medications. This solution accelerates the re-establishment rate of fish tank bacteria, after upsets, ensuring your fish thrive
AMERICAN-MADE EXCELLENCE – Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium
9 reviews for Brightwell Aquatics MicroBacter Start XLM – Concentrated Freshwater Nitrifying Bacteria – Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering – Aquarium Water Treatments, 16.9 fl oz
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Nick wiegers –
Simple and easy
Very easy to use and extremely effective for not only turbo starting your aquarium but also maintaining good levels. Brings Ammonia to 0 very fast.
Cody Luera –
Worked really well. I fishless cycled a marine tank in about 2 weeks
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.
J. Holman –
Worked better than expected.
First off make sure you follow the dosing instructions. For the first 6 days I was using this stuff I was actually under-dosing. Had my math wrong due to size of tank. Once I figured it out and started adding the correct amount my tank cycled quickly. Total cycle time was right at about 14-days, could have been less had I actually dosed the right amount from the start. Would recommend and will use again for future tanks.
Charles –
I must have for a new set up salt water tank
A good product
TML –
Works Great
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.
Donald Martin –
Works well to cycle new tanks!
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.
Arindam Chakraborty –
One day Cycle Reef Tank
If you want to create a New Reef tank in Hurry it’s one of the Best Bacteria for Cycle in Tank in 1-2 days. I recorded the results every 2 hours and it’s amazing that in first 2 hours it’s starts the Ammonia up and down by 4-5 hours and N02 becomes high and down 7-9 hours and N03 takes time little bit more like 22-30 hours. but 38-40 hours its everything in low and as per reef condition. But have to use Bio Media like Live Rock or Carabsea Sand.For my Tank I used CarabSea Life Rock 20 LBS, Carabsea Life Sand (White and Purple) with Reef Sea Reef Salt-Blue one (not Red sea Coral Pro). I don’t Turn on the light more than 6 hours in first 2 days and in Day three i Added two SPS and 3 LSP and it’s Perfect. PH-8.2, Alkalinity – 9 and Salinity 1.35 now my tank is running perfectly and after 2 days I turn on Light and Protein Skimmer. Money worth with this bacteria
Joe Steenblock –
Good product likely undermined by hot warehouses
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.
Dr R. –
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.