Brightwell Aquatics MicroBacter Purple M 500ml is a premium live microbial culture that accelerates the growth of purple and pink coralline algae in reef aquariums. Coralline algae not only enhance the look of your aquarium with natural encrusting colour, but also help stabilise rockwork and outcompete nuisance algae. This advanced formula introduces beneficial non-pathogenic bacteria that support biofilm formation and nutrient cycling, making it especially useful in setups using dry rock or artificial substrates.

Key Features:

• Promotes rapid growth of purple and pink coralline algae
• Introduces beneficial bacteria for stronger biological filtration
• Helps outcompete unwanted nuisance algae
• Ideal for new tank setups, dry rock aquascapes, and system upgrades
• Safe for all marine fish, corals, invertebrates, and macroalgae
• 500ml bottle – suitable for ongoing maintenance or cycling new tanks

Brightwell MicroBacter Purple M speeds up the maturation of reef systems while improving visual appeal and biological stability. It is safe, effective, and highly recommended for aquarists looking to establish coralline algae quickly and maintain a healthy marine environment.

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.