I have a 100 gallon fish tank with 5 koi, 2 catfish (babies) and 4 small blue gill. I have it set up with two grow trays using lava rocks and two kedsum pumps (640 and 1000) filtering through ammonia reducing pads. Water PH has been ranging between 7 and 7.5, ammonia 0, nitrates and phosphates 0. At the beginning of spring I screwed up added new fish without quarantining them. They all died one at a time. I treated for parasites with malachite green and later with erythromycin. This seemed to allow the koi to recover. Added salt to bring salinity up to max allowable without killing my plants. Everything stablized until 2 days ago when I found a koi floating. 2 others looked bad so I quarantined them all. Treated in the quarantine tank with Melafix. The next day I changed the water 25% with water sitting for 24 hours to dechlorinate, brought salinity up to 250ppm and treated with Prazipro. 3rd fish is much more active and eating again but still looks dull. The other two died. Attached are pics. I found one dark worm floating in the water when I took them out and started examining them. I noticed one seemed to have a similar color spot on the side. Does anyone know what this might be? I am getting ready to remove all fish and do a complete water change out after I sterilize the river rocks with boiling water. I am also going to take the plants out of the grow trays and transfer them to pots with soil. Just wondering if anyone has seen this.
BTW, I recently discover several tomatoes have been chewed up by a jerk squirrel and I am fearful he dropped poop in the growtrays which is why I am transferring to pots.
BTW, I recently discover several tomatoes have been chewed up by a jerk squirrel and I am fearful he dropped poop in the growtrays which is why I am transferring to pots.
