Bad water parameters (or nutrients as Atnixon calls them) are what is allowing that to grow. You manually remove it but it comes back because you have not found the root of your problem. If you find the root of the problem, then it will disappear. Make sure though that this is not a macro algae versus hair algae. I've seen some beautiful red macros out there. if it is truly hair algae, here would be my recommendation:
1. No cleanup crew is bad. Put in snails, hermits, and crabs. They will eat the waste that it just turning into ammonia. I would get online and buy a "cleanup crew package" but its going to run about $100 or so for a 55 gallon tank.
2. Check your water parameters and start doing water changes. Don't use some goofy chemicals that someone might recommend. The best thing would be water changes since its natural. You need to find out what is out of whack.
3. Check your water flow. Algae will grow where there isn't much flow in the tank. You can add powerheads to increase circulation.
4. Check your filtration system. Is there detritus built up in your wet/dry at the bottom? (Looks like sludge). is there detritus built up in your overflow area on the bottom? if there is, I would vacuum this out with a wetvac and clean it out. If there is, Im betting your nitrates are probably higher than normal as well as potential phosphate issues.