Backyard Aquaponics
A place to discuss aquaponics

I have been crushing up trout pellets for my SP since OBO had advice from Gidgy. They need a high protein when they are small and over winter. Some bits of the trout pellets still float, but they break the surface and clean them up.

It's not uncommon for pH in aquaponic systems to rapidly go from around 6.8 to 6.0... especially "newish" systems... as nitrification really kicks in with an increased feed load...

And most established mature and highly productive systems are commonly around 6.0-6.2....

See Joels, F&Fs, mine.... and many others...

And rather than try and hold your tank at 7.5-8.0 Boris.... you'd be better off holding it around 6.5-6.8 IMO... otherwise you'll suffer trace element lockout... especially iron....

Just test it periodically... and when it's around 6.0-6.2..... then buffer it back a bit...

Other than that.... leave it alone.... just add fish food...

Actually, what they need .... is a higher daily intake of protein.... 3-5 feeds/day (depending on water temp).... when small.... then 2-3 feeds/day....

woo hoo , another dead silver today

no signs of disease or damage on this one , just upsidedown dead thismorning

Water temp is at 20 ( theyve survived lower in the other system )
pH down to 6.6
ammo & nitrite 0

this is a week since the last death , I thought I was past the problem , whatever it is

Brand new member, so excuse my delay to your situation.

Had similar problems with my silvers, developed ulcer like wounds along their flanks. initially attributed problem to aggressive behaviour by jades.

The silvers up to 100mm where the most prone, however I was advised by others it was a bacterial infection, exclusive to silvers.

Tried numerous treatments without success.

Recalled advice dam stock fish do not exhibit same problem, out of desperation I relocated the a single mature fish into a pond, and bang. The wounds have almost completely healed after 4 / 6 weeks.

This particular fish was on the verge of being cat food, others have suggested tannins in the water may have contributed to the healing process.