Pond sealer & dead plants

~ janj wrote:
... fish can survive
high pH where plants will die. Plus I think saying something is "fine" is
pretty general, goldfish are tough. ~ jan

Pretty good discussion so far. Ingrid has almost certainly thought of
this already, but the sealer may be somehow toxic to plants but ok with
fish. That would not necessarily show up in any of the usual water
tests. Another 100% water change would reduce this factor, because most
of the possible toxins may have leached by now.

OTH, perhaps catfish chow is the secret ingredient for growing pond
plants ) .
d.