Please note: You are now making an order on behalf of a user.

Marine Aquarium Maintenance Guides

Please feel free to download our handy marine aquarium guides below. These free guides have been designed to help you with all that important – and sometimes challenging – aquarium maintenance. With expert advice on everything from tank lighting schedules and water parameters to fish compatibility within your tank, we’re here to give you all the support you need.

We also have a couple of easy-to-use calculators to help you calculate water volume with your aquariums, and to tell you how much live rock you need based on the water volume in your tank.

Download one of our marine aquarium guides

Water Parameter GuideCheck the ideal parameters for a healthy, well-balanced aquarium environment. Includes recommendations for salinity, temperature, and much more.Download PDF
Water Parameter Guide
Fish CompatibilityNot sure which fish can live together? Use our handy reference chart to check the compatibility of more than 30 different species! Download PDF
Fish Compatibility
Recommended Lighting ScheduleLighting is very important in a marine ecosystem. Check our recommended lighting schedule to find out how much light your aquarium needs.Download PDF
Recommended Lighting Schedule

Use our helpful calculators

Live Rock Calculator Enter your tank’s water volume (in litres) to find out how much live rock you should put in your aquarium.
Calculate
Live Rock Calculator
Water Volume CalculatorEnter the length, width and height of your tank (in centimetres) to find out how much water it will hold.
Calculate
Fish Compatibility
Calculator

How much water will my tank hold?

How much live rock do I need?

Our Reward Scheme

Earn points as you spend! £1 = 1 point. Points can be redeemed against future purchases.Sign Up For An Account
Shop
Register an account on the Rock ‘N’ Critters website and order online with confidence.
Earn
Every time you make a purchase, you earn points – 1 point for every pound spent!
Redeem
The points you earn will give you money off future Rock ‘N’ Critters purchases!