have lost a total 5 fish in the last two weeks a big one to day and looks like another on its way
see photo s below on left is tap water
right is pool water with a swimming pool tester is the same
pond is aprox 4.0 mts x 4,0 mts x .800 mts deep concrete pool above ground with nexus easy pod filter and a home made pre filter with uv light have 3 airstones going
air temp 50f 10 c
pool temperaure is 53f 13c
i have just done a strip test from OASE
nitrat 25
nitrit 0
gh 21d
kh 7
ph wert 7.4
ch 0
see