Everyone should own one of these very useful cleaning accessories. Soft algae are removed using the foam pad, somewhat tougher stuff using the green fibre pad on the flipside and the most stubborn deposits and removed using the safe plastic blade edge. Plants can even be safely replaced using the planting fork at the other end. Available in 3 different sizes.
Sometimes you just have to get your arm in there and give your set up a damn good scrub. Using the wrong pad an easily mean a scratched and ruined aquarium. This pad is very gentle and purpose made for smaller plastic aquariums and glass ones where softer algae is grown.