Tropica CO2 System Bio 60 days Options:CO2 Bio Kit A single 100ml bottle will

A single 100ml bottle will treat 4000 litres of tap water

but other species of crab or small fish are at risk of being attacked or eaten

Moderate - aggressive

Dragon Wrasse

pH is the measure of the acidity or alkalinity of the water in your aquarium

Tropica CO2 System Bio 60 days Options:CO2 Bio Kit A single 100ml bottle willTropica CO2 System Bio CO2 is the most important nutrient for plants. Without a CO2 supply, the plants will not thrive. CO2 System Bio is a simple solution that adds extra CO2 to the plants in the aquarium. We recommend 20 25 C for the best use of the product. For improved growth of easy and medium plants 60 days CO2 for a low cost Safe to use Easy to refill and recycle Both the BIO system and BIO refill includes enough CO2 for approx. 60 days usage.