There is some kind of growth growing in my tank. Growth dosen't accuratly describe it. The more accurate description of it is dust. I recently turned my non planted tank into a planted tank. I added florite then waited for the water to clear. I had maybe 1 cory and 1 convict ciclid. I gave the convict away then started to add angle fish. I started with 4. then i moved up to 6. Other things in the tank: 2 bala sharks, 2 corys, 3 neon tetras, 2 rapheal catfish and a female guppy with some fry. Well my angels keep dying. i'd say i've gone through 10 - 12 including the 3 i have left in the tank, 1 is not eating now and i've noticed that he has stuff hanging off of him. Kind of looks like the growth on the plants and the decor. However i did not notice this on the others that have died. Then i noticed that he has his mouth open and some of this growth is coming in and out of his mouth like hes breathing. Firsh i though it was where i was getting them(petsmart/petstore in town/petco). Got more else where, they died too. Then i thought it was the fact that i didnt have a heater. I added a heater and set the temp to 80F. More angle fish died. So then i thought that i was changing to much water. So i stoped the 50% water changes and started just 20% now i've noticed stuff on the fish i mentioned earlier. The tank is cycled, nitrates have stayed low, no nitrites or ammonia. The water is very hard. The PH from the water that comes out of the tap is high (7.6) but in the tank its low (6.4) After this one thats about to die, dies the 2 left in there are ones from probably the first batch or 2 that ive bought. So ive had 2 stick through everything. I do have different types of angle fish. And the 2 that are alive are of the same type. The ones that keep dieing are the ones with the long "striggy" dorsal and pelvic fins but i have had some of the other type die as well. And the ones that have died appeared to have died from the swim bladder disorder. I have some Meadel medication im about to add. Someone please help my angles.