Hello, I will post on this forum so I may receive help from you guys, maybe someone has experienced this and nows how tondeal with it! Any help is very much appreciated!

1. Please explain the problems with your fish. When did you notice the problems and did anything unusual happen that you think started them?[/B]
I noticed it a month ago after introducing 3 Ancitrus fish and lowering the aquarium temperature to 27C

2. Symptoms (i.e. turning dark, excess slime, not eating, clamped fins, flashing, darting, clamped gills, white/yellow/green poop, hiding, headstanding or tailstanding, white on tips of fins, rotting or fungus, blisters/white zits on fish, bloated, cloudy eyes, wounds).
Everything starts with one nosetril red and inflamed, later comes the second nosetril on the other side of the fish. At a later day Discus is breathing heavily on one gill and other gill is shut off completely. Discus shows no discoloration/darkening

3. What medications/ treatments have you already tried and what were the results. Include dosage and duration of treatment.
I dosed Esha 2000 (multi antibacterial treatment) and Esha Gdex (Praziquantel) 2.5mg/l for 3 days. It helped alot but after a week all symptoms came back


4. Tank size and ages, numbers and sizes of fish.
The tank is 450 litres, 150x50x60cm, about 2 year old tank with 3 17-18cm discus fish left

5. Water change regime (What percentage and how often).
I change about 40-50% water every other day

6. How long has tank been running? Is it bare bottom? If you have substrate, what type and how deep is it?
The tank is running for almost 2 years, it has sand gravel, about 2cm thick, which gets vacumed two/three times a week

7. Do you age your water? If you do for how long and what is the ph swing.
I use purely RO water but bring back KH and GH with RedSea Alkaline buffer, Calcium and Magnesium solutions. Also add DiscusCode by Brightwell Aquatics to remineralize with trace elements.

8. What type/brand water conditioner do you use? Do you add it to the tank or aging barrel? How much do you use?

9. Parameters and water source.
RO water

Note: Water Parameters are important in diagnosing problems within a tank. If you don't own test kits for the following information, you can purchase them, test your parameters and post this info as soon as possible.

- temp 27C

- ph 7.4

- ammonia reading 0

- nitrite reading 0

- nitrate reading 5-10 mg/l

What type of water or combinations of water sources do you use? If it is an RO/tap/well water mix, please list percentages in the mix.

- well water 0%

- municipal water 0%

- RO water 100%

10. Any new fish, plants or inverts added recently.
1 month ago I added 3 Ancitrus super red fish

11. Please tell us what you feed your fish and how often. This can be critical information for solving the problem so be as specific as you can.
I feed frozen sea-food based food once a day fortified by GarlicPower, Vitamins and 3-6-9 omega acids, followed by Tropical D-50 Granules and in the evening they get Tropical Soft-Line America granules

12. Include any pictures or videos you have which shows the symptoms. If you can't add them to this post, please provide a link to them.