Originally Posted by
Sly
http:///forum/post/2678590
Did your sps start bleaching before or after you cleaned your glass top? It could be suffering from photo shock and may need to be reacclimated to your lighting intensity. They started bleaching before, and when I did clean the salt buildup from the glass top, I used a wet paper towel, and dried it before I put it back over the tank.
Also, I think a 50% weekly water change is a bit much. Have you done this all the time? Are the temp, pH and salinity readings exactly the same as your tank water when you add it in? Yes they are. The pH may be slightly different because theres no light in my water containers, but they definitely are very close.
During the process of changing your water and cleaning your top, is there any chance that you got some contaminate in the water? Lotion from your hands? Glass cleaner, etc.?Its possible. I dont really have RO/DI water to wash my hands in, cuz if I washed them in tap, wouldnt it be just as bad?
How much to you top off when you add distilled water? If you are adding cold water could there be a chance that you are temperature shocking your system? On a tank that small, 2 gallons of top-off would translate into a ~10% increase in tank volume with cold, low salinity water. On average, about 1/4 to 1/2 gallon at a time. I try to let the water sit before I add it so it has a chance to get room temperature, as opposed to CVS's lower 70 degree stores.
With all the changes you are making to your system, you could just be simply stressing it out too much. Temperature shock, rapid changes in salinity, photo shock, possible contamination from your hands or cleaners... and as others have said, phosphate buildup due to possible poor top off water quality.
Thank you for the help. Im calling up a good friend of mine who should have a phosphate meter today, and if I can swing by, Im bringing a tank water sample and my distilled water.
Im starting to believe that it is the dissolved organics and the phosphates. I used a phosphate pad (for the amount of time on the box, so its not like it could have leeched back in the tank due to overuse) and that would tell me I have low phosphates, yet if the distilled was the source, then it should be pretty high.
I added a maxijet 900 to the tank a few days ago, to bounce the flow around the tank a bit more, and from the polyp extension Im getting (on my digitata frags), they seem to like it.
Maybe I should just try to get some LPS instead