how big is your tank?


use luke warm water to wash off the peat. if you can use some purified water that will help also.

about the heater i wouldnt use anything to big you have to think about how much water is gonna be in the tank. if you only gonna have 5 galons of water use a 25 watt heater for 30 gallons use a 150 watt heater

5x ((gallons of water)) = wattage of heater to use


i dont know the metric for a gallon but 300 watts is an assload of heat!

your trying to grow plants not make a fuggn pot of coffee!