HOW-TO
STEP_005:
Next you want to prepare your algae samples. They are the most important part of this whole project. You can buy your algae from an online retailer or find samples to use in your nearby pond, river, hot tub, aquarium or that glass of water that was forgotten on the windowsill.
You should pre-mix your chlorine-free water, with the plant food, high in nitrogen and phosphorus and algae sample(s), in one container so that every bottle will contain an equal amount of nutrients and algae. Fill up each bottle with the water and plant food mixture until 3-5cm below the top, cover them and make sure they are all secure. Cover your air conditioner, if it is not already.