Take biological filtration deeper with Hydrospace PNS Deep Cycle, a specialized live bacterial culture designed to support nutrient cycling and microbial activity within aquarium substrates, rockwork and other low-oxygen areas of the system.

PNS Deep Cycle contains a diverse consortium of naturally occurring bacteria selected to complement the activity of purple non-sulfur bacteria while supporting the biological processing of nutrients and organic material.

Unlike products focused primarily on the water column, Deep Cycle is designed with the aquarium's deeper biological zones in mind, making it an excellent addition for established reef, marine and freshwater systems where a diverse microbial community is desired.

Why PNS Deep Cycle?

Live Beneficial Bacteria
Introduces a specialized consortium of live microorganisms to increase biological diversity throughout the aquarium.

Supports Deeper Biological Zones
Designed to support microbial activity within substrate, porous rock and other areas where oxygen availability may be lower than in the main water column.

Supports Nutrient Cycling
Helps strengthen the natural biological processes responsible for breaking down and recycling nutrients within an established aquarium ecosystem.

Complements PNS ProBio
Deep Cycle can be incorporated alongside Hydrospace PNS ProBio as part of a broader approach to aquarium microbial diversity and biological management.

Marine & Freshwater Compatible
Suitable for reef, saltwater and freshwater aquarium systems.

Available Sizes

16 oz – $39.99
Ideal for home aquariums and routine use.

1 Gallon – $279.99
Designed for large aquariums, multiple systems, fish rooms, aquarium maintenance professionals and high-volume applications.

How to Use

Shake well before use.

PNS Deep Cycle can be incorporated into an aquarium maintenance routine to support microbial activity within substrate, rockwork and biological filtration areas.

For dosing amounts and frequency, follow the current Hydrospace instructions provided with the product and adjust use according to aquarium volume and application.

For best results, maintain stable aquarium conditions and appropriate filtration while incorporating bacterial supplements into your overall aquarium-care routine.

Product Details

Brand: Hydrospace
Product: PNS Deep Cycle
Type: Live Bacterial Culture
Available Sizes: 16 oz & 1 Gallon
Aquarium Type: Marine, Reef & Freshwater
Primary Use: Microbial diversity, nutrient cycling & biological support
Ideal For: Substrate, rockwork & biological filtration zones

Why Buy From Infinity and Beyond Aquatics?

Infinity and Beyond Aquatics offers carefully selected aquarium products for hobbyists and professionals looking to build healthy, stable and biologically diverse aquatic systems.

Our Hydrospace collection provides microbiology-driven solutions for reef, marine and freshwater aquariums, including products designed for microbial diversity, biological support and specialized aquarium nutrition.

Shipping Information

16 oz Size

The 16 oz bottle ships under our standard shipping policy and is eligible for FREE Standard Shipping on qualifying orders over $100.

1 Gallon Size – Medium Shipping

Due to the additional weight and handling requirements of the 1 gallon container, the gallon size ships using our Medium Shipping rate.

The 1 gallon size does not qualify for standard free shipping promotions. The applicable Medium Shipping rate will be shown at checkout.

Orders are typically processed within 1–3 business days, and tracking information will be provided once your order ships.

Products in the same order may arrive in separate packages depending on fulfillment location.

Shipping Note: 16 oz is eligible for free standard shipping on qualifying orders. The 1 gallon size ships at the Medium Shipping rate due to its weight.