Ok back...
<center>PART II</center>
First I don't ever clean my substrate I let my cuke and snails do that for me. In the event of cyano or severe algae I recommend a siphoning of the upper layer of substrate but carefully.
Ok As I was saying earlier today...
If our tanks begin to adjust slowly to the lack in water changes on a regular basis then they simply get used to coping with the nutrient import/export problem. Now this is not suggesting that you stop doing water changes on your old tanks. It only means that if you have stopped doing those frequent changes slowly and have noticed that your tank is doing just as good now as it did when you were doing them your tank has reached What??
All together now! B-A-L-A-N-C-E .
I figured this out through trial and error and after doing countless tests on various tanks over the past few years. The only way I could explain someone having a system that did great with very low maintenance was by narrowing down what they all had in common. Guess what it was? They all had owners who were once vigilant about maintenance but since every thing looked good physically they didn't do as many changes.
This was however bad news for a few who learned that no maintenance was a very BAD thing as slowly over time the nutrient levels began to rise beyond the capabilities of the biotope to compensate. By this point (3 years in this particular case), nitrate was off the charts and over 50% of the water had to be changed out. Guess what happened then? Yep I got blamed for killing all this guys animals and causing an algae bloom, all because I told him he had to do a water change, which he did. It took me a few years to figure it out but basically the algae that began in this case was the result of a new healthy balance being achieved. It took him about a year to get his tank back to normal and now he does his water changes regularly to avoid the inevitable accumulative effect of negligence. So to answer the initial question you do water changes as the tank system requires. Do you tests, Nitrates and Phosphates and watch your coral they are the best indicators that something is not quite right. If everything looks great do what you have been doing, if you are getting tired of weekly water changes cut back a bit. HOWEVER be warned of this: We do water changes more to replenish the trace elements that the coral pull out more than waste removal. If you slack on water changes you will need to add more trace elements to make up for the loss of a fresh supply IMO.
Has any of this helped anyone?
I hope so,
I'm finished for now though
