Warehouse Aquarium;541945 wrote: In my experience of dealing with hair algae for 32 years, I have learned that hair Algae grows by a multiple. The more you have, the more it grows. While it is ESSENTIAL to remove phosphates, high temps, limit feedings and limit lighting,(which has been covered very well by all of the other posts on this thread) it is equally important to remove as much of it, as soon as possible.
If you are as lazy as me, (not too lazy), a great number of natural clean up crew is extremely helpful. While most snails and hermits do not eat the large colonies of hair algae, they do help tremendously keeping new growth under control, as long as you have enough, and you have manually removed as much of the large colonies you can. Of course, when you have a large population of cleaners, you will experience some loss, (starving). But since most cleaners are a buck a piece, it seems to be a small price to pay to have your aquarium look nice.
The X Factor.... The dreaded Sea Hare. Everyone in this hobby has a different level of risk tolerance, when it comes to their tank. Some will take the risk of putting a sponge, sea cucumber, sea apple or a sea hare, even though they know that any one of these animals can release toxins in the water if threatened or dies in their tank. Having said that, I am not advocating one way or the other on any of these animals. In my experience, the sea hare has been my secret weapon, when I need to eliminate my hair algae problem. Very often, a sea hare can eliminate a hair algae problem within a week. Having said that, they can also starve to death very easily. If you ever use one, I suggest getting rid of it once it has done the job. This will mitigate your risk to some extent. Just think of it as hiring a hair algae maintenance guy for really cheap. As far as the husbandry of this animal, three things I highly recommend:
1. Make sure the animal is moving before you buy it.
2. Acclimate the sea hare like a cleaner shrimp, extremely slow and careful.
3. Do not buy one if you have a temperature problem, If your tank is above 82 degrees, your tank is probably too hot for a sea hare.
This advice is not scientific by any means, but based on personal experience. Good luck.