kstater
Member
recently switched from a 55 gal to a 75 gal. All Rock, Sand, and water from the original 55 was taken out a put into the new 75 gallon. Coraline was starting to grow in the 55 at the time when i changed and i had 260 watts of pcs on the tank. And now in the 75 i have 2 X 250w MH and they are is a bloom of diatoms. Is this because of the new lights. The tank is not cycling again is it, because i has been cycled for a long time. Does this happen with new mhs if there is a large change in lighting? Will it go away? When the lights set in? These are brand new XM 15k bulbs.