Hi Guys, I'm after some advice on what I can do for my sick fish. A couple of weeks ago my phosphate filter clogged up & blocked all water flow at sometime during the night, the next morning my regal blue tang was looking pretty sick & I thought it was going to die. I got the filter cleaned out, did a 50% water change & got every thing going again. The tang came good & I thought I was OK. A couple of days later my flame angel got a cloudy eye which I treated successfully with a Melafix & Pimafix treatment, it then seemed to get white spot, I also noticed my regal blue tang starting to scratch itself on the live rock (but couldn't see any white spots) a couple of days later the white spots came out on its fins so I started a Vertaid (Quinine Hydrochloride Malachite Green) solution treatment. The flame angels cloudy eye has come back (both eyes, but one is worse than the other), & almost overnight its front fins look like they have fin rot, it's also started to loose colour on the main part of its body (the orange around the edges & the purple on its tail are still brilliant colours), so I have started the Melafix & Pimafix treatment up again. Today my regal blue tang is constantly scratching (more than before) & has little lumps on its body that look like pimples. I have been treating them with the Vertaid for 4 days now at 1ml per 70 litres. The flame angle is starting to hide in the caves in the rocks, it still seems to be eating (a little less than normal) & comes out & swims around every now & then. Other than the flame angel & the regal blue tang, all other fish & inverts in the tank seem unaffected. The water conditions are all normal & within safe levels, except for a lot of very fine particles (almost like dust) floating around, I have seen them get sucked into the filter, but they seem to be too fine to be trapped & end up back in the tank, ( water changes thin them out a bit). My water temp is a stable 25-26 degrees Celsius & I have a 5 level canister filter (with the activated carbon removed while medicating) a 8 watt UV filter & a phosphate filter, the tank is a 155 litre with 28 kg of live rock. What else can I do? Regards Glenn Pritchard.