hi i have just purchased a 30 litre biorb and wish to change it to have tropical fish do i have to use a special biorb heater or can i use any other heater
many thanks for your help
You can have any heater, just make sure it's wattage is appropriate to your tank size. Avoid the heaters that have a pre-set temperature. I use Eheim Jager heaters in all my tanks. They are quite accurate.