You may not like my opinion, but you could take note that 99% of the posts on Reef Central are not in all caps for a reason. I was just bringing you up to speed, not trying to aggravate you.
Your questions don't pertain to the topic of this thread (pests), which is why I suggested you start a new thread where it can be answered in full.
Here's your original question:
Question.....I had two acros in a newly cycled tank...However they bleached..Could this be because of water temp fluctuations??
I havent connected my chiller yet because my water is 79 deg. At night and 82 during the day with 3 x 400 watt mh lamps on...Is this fluctuation bad??...I just wanna grow nice stonies...Grrrrr,.Frustrating..
Btw my tank has only been running for 5 months....Should i wait longer before putting in acros????
Acropora require stability and if your tank is newly cycled, water parameters tend to be all over the place. It can take up to 9 months for a tank to level out so that SPS will thrive. The temperature swing you listed of 79 to 82F isn't that bad, but if you can get your chiller to lessen that swing, it will help. If you can't do that yet, installing fans to blow across the top of the tank while the MH are lit will help reduce the rise in water temperature.
There are other factors as well, such as if you use RO/DI water vs tap water, what the alkalinity, calcium and magnesium levels are, what the salinity is and if you top off daily, etc... High nitrates can be a problem, as well as high phosphate levels. It could be allepathy from other corals stinging these, or fish nipping at them due to be incompatible together. Your lighting period could be too long. The corals might not be acclimated to the 400w bulbs you have, or are too close to the bulbs. The bulbs could be too close to the water surface as well, etc, etc, etc...
I did a google search to help convert all caps if your keyboard is broken.
http://www.convertcase.net/
