Algae outbreak!

You can try and manually removing the long strands and siphoning too. But keeping excess nutrients out of the aquarium water is one key element in eliminating your hair algae. There are many things that can add excess nutrients into your tank like some commercial foods which may contain undesirable things like nitrates, phosphates etc and overfeeding the tank is also another factor. Using a phosphate remover, RO/DI water, a good tank clean up crew ie. hermit crabs and snails and a high quality salt with no NO3, phosphates etc like Tropic Marin or similar good quality salt should really help bring the algae.

 

+1 to vawdka's link on reactors.
Aquarium Mechanical Filtration Media: Blue Bonded Filter Pads
Here is a type of polyfilter. I get mine from my LFS they sell it in bulk for cheap.

 

13 hours a day!

Holy daylights Batman!

 

You can try and manually removing the long strands and siphoning too. But keeping excess nutrients out of the aquarium water is one key element in eliminating your hair algae. There are many things that can add excess nutrients into your tank like some commercial foods which may contain undesirable things like nitrates, phosphates etc and overfeeding the tank is also another factor. Using a phosphate remover, RO/DI water, a good tank clean up crew ie. hermit crabs and snails and a high quality salt with no NO3, phosphates etc like Tropic Marin or similar good quality salt should really help bring the algae.

 

I've used a reactor with NPX pellets and got rid of algae just fine.