How clean is your tank?
When I mean clean I don't mean the chemical parameters we test rather how much detritus build up is there somewhere in your tank?
Is it on/in your rocks?
In your sand?
Your sump?
Your water column?
You put food in your tank right?
Your fish eat that food right?
Your fish expel waste right?
You have a clean up crew that takes care of it all right?
Who cleans up after the clean up crew?
Bacteria?
Think about it for a moment before you answer.
At some point what you put in will be consumed, utilized, broken down and discarded.
What then?
Most who do water changes will tell you the reasons why they do them are:
1. Reduce those chemical parameters we test.
2. Replace the trace elements that are used by the reef building community.
3. Make the water look cleaner.
4. Makes us feel in charge of a small world and we know what we are doing.
5. Remove that waste before it has a chance of impacting #1 - 3.
Today I removed all of my rock out of the tank including the floor and I drained all of the water and sucked all of the mulm off the bottom. I knew I had a large amount because any time I moved my powerhead around it looked like a snow storm in there. I will have to go back in this thread to see the last time I did this but I bet it has been a few months but here is the amount I pulled out of my tank earlier today. It is in a 7 gallon salt bucket and there is a nickel on the left side to show the amount. It is probably about a 1/4 inch to 1/2 inch deep as well. Some of it is probably sand from the rock I made but a majority of it is just detritus that was either on the rock work or underneath the cement floor.
These next pictures show the growth pattern of my frags. They have not opened yet but I wanted you to look at the mats. If you look in the first picture, the polyps look like a Christmas light string and they follow one another. I have several frags that demonstrate this growth pattern. In the second and third pictures if you look at the outer edge, the newest polyps, you will see that they are very tight and compact like a phalanx. These get the most light and the most flow so that could have an impact. However if you look at the older polyps they spread out like in picture #1 which happens to be at the water's surface and when these are exposed to the air I know it is time to top off.
Thanks for stopping by and please enjoy your tank.