Algae bloom is one of the common problem faced by many aquarist, especially those who have outdoor tanks. Patches of
hairy algae in the fish tanks will harm the tank's biodiversity and will destroy the tank's beauty, it is a headache for aquarists who faced this problem.
Basic Prevention of Algae Bloom
Do not give over lighting to a tank as this accelerate the growth of algae, controlling the time of lighting in a tank is vital in preventing algae bloom. If you are having an outdoor tank, try to prevent it from been shine by the sun all day through any possible and suitable method!
Furthermore, too much nutrient in a tank also causes algae bloom. If the plants in your tank cannot use the nutrients efficiently, the excess nutrients will be use by the algae for their growth.
Countering Algae, The Biological Ways!
There are many kinds of chemicals and medicine in the market that can remove algae in a tank, but I prefer using the biological ways.
There are indeed a few aquatic animals that are good in removing the algae from tanks. this includes all sorts of plecos and sucker-mouth fish. There are also the cute siamese algae eater available in the market as an replacement to those big plecos. For planted tanks, cherry shrimps, amano shrimps, yamato shrimps and red ramshorns snails are the best as they have smaller sizes and suit better with the planted tanks.
Conclusion:
It is best to prevent algae bloom then countering it, but if the algae bloom do happen, it will be better to use the biological ways then chemicals ways since you won't sure what secondary effect will the chemicals have, it can be destructive to your tanks in different ways!