It clears. Why would it not be in the column? The fish are not on the rocks and sand. Hiw are they getting it if its not in the column? They advertise the filter as filtering ich. Anyway its clearing up now. I use the filter. Its capable of catching the ich. Can't see obviously if it is.
Yes. Well thank you and thanks Jay. Epsom salt killed all my coral so I guess I could have used copper. I used Ich X in a 75 a few years ago coupled with a Vortex Diatom filter. I did not let the tank sit fallow. The outbreak never returned. I ran the filter still after the medicine cleared it. The Niger Trigger spots are fading. The Sailfin Tangs eye has cleared and his spots are gone. I don't say diatom cures it. I say it asssts in diminishing the Ich that is attacking the fish.I’ve used diatom filters since the early 1970’s - they just don’t cure active ich infections. There is the dwell time issue, plus blow by, plus the fact that the ich theronts emerge from the cysts in the early morning and attach to the fish at the bottom of the tank - never going through the filter.