well first off, before treatign with the chemi clean, try to eliminate the source of organics that is causign the slime to occur. what kind of freshwater are you using to mix salt/topoff? check this source water for phosphates/nitrates, as this is often the source of the excess organics. second, how often do you feed? if you feed often, and heavily any excess food that falls to the ground is going to be broken down adn the end products would be nitrates and phosphates, whcih would encourage the slime to grow. Third. how is the water flow in the problem area? do you have enough circulation? if you increased circulation, and try to eliminate the soource of the excess organics, the slime will disappear. and lastly how long are your lights on? perhaps try cutting back on the photoperiod adn see if this helps.
Use chemicals to remove the algae as a last resort only, and try to figure the problem out first.
also, a good rule of thumb to follow is one cleaner per gallon so in your 120 you should have 120 cleaners, a mix of snails, hermits, crabs(emerald/arrow), shrimp(peppermint,cleaner,etc), conch, etc. the best snails to combat redslime, IMO are nassarius, cerith, and queen and fighting conchs. For hair/green algaes, the trochus work wonders, but astreas and margaritas work well also. you ideally want to have a diverse clean up crew so that all angles are being attacked. think of it as a militarty squad. you want a demolitions guy, a sniper, a scout, many infantry, a leader, etc, each who specialze in a certain area. this is what you wanna try to acomplish with your clean-up crew!
good luck
jon
