Backyard Aquaponics
A place to discuss aquaponics

Good to hear from you Elias, sorry you're having issues with the fish portion of your AP. You'd think carp would be more tolerant to water issues, I guess you're learning that isn't the case.
I hadn't had issues with carp ulcers in our ponds, but I'm curious so I looked it up https://www.pondexperts.ca/pond-advice-tips/how-treat-ulcers-in-koi-goldfish/
Oh boy, so I can see how fixing the problem can be exasperated by the relationship of fish and plants in aquaponics.
I did have ulcers on our trout at one point and so I know what you're going through, thinking "how do I get an infectious disease out of the biofilter and grow beds?" What type of fish are you raising?
Perhaps you've already thought of switching to a fish species that doesn't get carp ulcers as a workaround?
Brian

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Brian's AP
I don't understand all I know about this
Specs: 2600 gallon (347.56cf) Masonry fish pond. 44cf GBs. 200 gal (26.7cf) ST. 15 gal (2cf) RFF. 50 gal (6.7cf) biofilter. Brook trout and Comets.

Yes Brian. It's a living thing! I feel bad when they are sick, scratching my head for solutions. Next year trout, something that raises the GH and Kh and not the PH and a Bacci House filter. Suggestions? Some kind of mineral kick? Seaweed?
Elias

If you can get the sick fish out of the aquaponics system and into a quarantine tank, you'll open more options in treatments. https://www.pondexperts.ca/pond-advice-tips/how-treat-ulcers-in-koi-goldfish/ . I'd add a UV sterilizer to the system plumbing after the biofilter to kill waterborne pathogens.
I bought one of these inexpensive UV sterilizers. I'd been told, "they don't last more than a season or two," so cheap is okay.

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Brian's AP
I don't understand all I know about this
Specs: 2600 gallon (347.56cf) Masonry fish pond. 44cf GBs. 200 gal (26.7cf) ST. 15 gal (2cf) RFF. 50 gal (6.7cf) biofilter. Brook trout and Comets.

Have two quarantine tanks. Treated them with salt as a first step. After that with antibiotics and let them stay to "clean out" in smaller tank. Ulcers back after a month. Have a 4" 75w UVC before the MB. Why after?
What is waterborne pathogens? Where do they live and how do they develop/emerges? Thanks for the link.
Elias

Hi.
At last. Rainbow trout in the system. Jipiii! 50x300gr. Had 54. 4 died, due to a very cold spring(stil cold) and because of that, low activity in the MB=ammonia. Fresh water, fresh water.........
Healhty and green plants though(knock on wood)
I have to come up with some kind of heating system to speed up the start up time. Tried to start without fish and fed the good guys with ammonia for 4 weeks. Stil no good nitrat produktion. How long will it take? Right now 0.5 ppm ammonia, getting lower by the day(good weather) and rising nitrat. Not too much food and the trouts are thin as a tie. Hungry!
How do you guys solve the equation concerning the trout tempreture, max 20°c, best 14°-18° and best temp nitrobacter, 25-30°? How do I calculate the amount of food and what kind of work will the MB filters perform in lower temp? Testing testing and the normal trail and error procedure? Somebody must have been where I am right now. Trying my best with trouts in a non heated greenhouse aquaponic system!!!
Elias
ps if I want to show a movie, how do I do that? ds