Re: why are my fish dying?
#7
Looks like flexibacter again to me, look at the head, erosion,slightly enlarged lower lip, the fins are showing finrot, but theres no other sign of nutrient drain, theres a mix of necrotic fluid and algae around the gills, and the lower fish has a post mortem septacaemic patch in the front midbody behind the gills.
Pond probably needs dosing with furan 2 to kill the infection of flexi and any fungi, and the pond itself needs more water disturbance, oxygenation and flow. Yup, it could have come in on the new plants, few shops of suppliers thing to QT plants, but equally the warm summer temps and lack of flow make it more likely to take hold. The pond is probably getting a bit too limpid and calm, for the fish , and the surface layer may be thickening, and with all the algae the nights might be 02 deficient making things worse. Considered trying a skimmer?
Perhaps a pic of the pond might show up why the conditions are proving deleterious to the fish, its entirely possible theres a design flaw that could be corrected or a piece of equipment that will make the pond friendlier to fish, and less so to algae, fungi and bacterial infections.
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