Nothing big died unless you count bacteria which I cannot see. Even the snail population seems quite the same. Opps, one firefish died but he jumped out of my tank so the nitrate won't be due to that. The skimmer skimmed a little more than before except for last two days (it almost overflow my cup with wet skimmate)that prompted me to test the water.
The fish load actually get lighter because I traded out my beloved 6" Powder Blue to my much smaller foxface(supposingly in Jhale's tank some day). The foxface eats a lot more macro algae all other tangs in the tank combined.
The water flow drops quickly due to whatever's clogging the tubes, pumps... after I added cyclopeeze to the diet, or once again may be just I added too much food.
The problem would most likely be overfeeding or the clown is moving the sand too much-she makes 2 pot holes the size of her size(3.5-4 inches) everyday. Finally, could it be too many shrimps laying eggs and trapped at the filter socks and attract even more dirt-they are completely soiled?
As for the brand of the skimmer, MOIDOL, can you help? It's the tank at the door on 18th Avenue.
The test kit is Aquarium Pharmaceuticals.
Last night, I did a 7% water change, clean all pipes, pumps and filter socks, water flow back to normal. Re-test the water the same kit, color is between 10-20 while testing it with another kit, same brand, 0-5. Time to dump the kits. It must have a shelf life issue. Got to find my other salifert to compare.
To explain why I suspect cyclopeeze at one time is that the bloody looking slimmy liquid make me feel that it will feed micro organism and thus attract large amount of the dirt to be deposited onto the sand bed and the tubes, and filter socks. After I change the habit of feeding, including both more regular frozen food and cyclopeeze, I noticed a lot more detrius on the rocks and the corals.