An article on PH:
Saltwater Aquarium pH and Alkalinity Simplified
The pH (power of Hydrogen) level in a saltwater aquarium is a constant concern to most aquarists. Whereas the occupants in a FO (Fish Only) tank can tolerate a fairly wide range of pH levels for periods of time with no major harm, the occupants of a reef tank rely heavily on a constant pH level in the right range to just survive, let alone thrive.
To control or adjust pH we must first understand what it is. In order to keep this discussion fairly basic, we won't get into the interactions of ions on a chemical level that make it all happen. We will just stick with what happens on a layman's level. If you are of a mind for a more scientific explanation, read John H. Tullock's "Water Chemistry: pH and Alkalinity"article.
pH is simply a measurement of the acidity or alkalinity of a solution.
A pH of 7 is considered to be "neutral", neither acid or alkaline. pH levels above 7 are considered to be alkaline or "base". pH levels below 7 are considered to be acidic.
The generally accepted pH level in saltwater systems is between 7.6 and 8.4, but reef tanks are a bit more sensitive to pH and should be kept more toward higher levels. The normal trend for pH in a tank is downward, or more acidic. The additions of acids into a tank will lower the pH in the tank water. These acids come from several sources, the primary ones being: (1) excess carbon dioxide (CO2) from respiration caused by lack of sufficient gas exchange, (2) nitric acid from biological filtration (nitrification), and (3) organic acids from metabolic wastes. Respiration and metabolic wastes are a natural part of the ocean. The reason that sea water pH does not change is that sea water contains a number of chemicals, such as bicarbonate, calcium, carbonate, borate and hydroxide, which act as natural "buffers" that retard the drop in pH.
The degree to which a solution maintains its pH when acid is added is termed the "alkalinity" of the solution. Related terms used in reference to aquariums are "carbonate or calcium hardness", and its German equivalent, "KH or dKH". The amount of "buffers" in sea water determines the alkalinity.
When the pH in a tank starts to drop, it is an indication that the buffers are getting worn out. There are a few things that you can do to remedy this increase in acidity. You can use "quick fix" methods by adding bicarbonate of soda (baking soda) or any number of commercial pH buffering products available on the market.
The generally accepted "tried and true" method for stabilizing pH is still performing regular partial water changes in your tank. This not only refreshes the natural buffers, but also restores the trace minerals in your tank water. Of course, reducing the causes of the drop in pH is always wise. Removing all uneaten foods and fish detritus from the tank on a regular basis will go a long way toward retarding the pH drop.
If you want to get into a more constant and automated (and a bit more complicated) method of maintaining your pH levels, along with adding the constant supply of calcium needed to maintain a reef tank, you can graduate to dosing methods or using a calcium reactor. To learn more about adding or dosing with calcium (a.ka. limewater or kalkwasser), as well as how it relates to pH, alkalinity and KH, refer to our Aquarium Maintenance and Care Resource Index.
When did you do your waterchange? Or are you doing it tuesday? That can help get the ph up. Also that oxygen sucking chemi-clean didn't help matters. I wouldn't worry about it.
The fish is a Blue Assesor, cool fish, basslett family (same as a Royal Gramma), also comes in Yellow, I'd get the yellow if I could do it over, it's to dark of a blue.
Yeah I had a Clarki and he killed my firefish, nasty mean fish, glad he's gone.
I do plan to get another red firefish to replace the one I had in a few weeks.
All fish have a unique personality. If your clowns are mellow I don't see why you couldn't get a flame down the road but flame angels have been known to nip on LPS and eat softie corals. Find a good LFS that will do returns
