Big problem - Need help

[Bob Hart]

Noticed your Oxygen levels and thought they did not look quite high enough. Found in my records the saturation levels for O2 for temperature ranges, which I've copied below.

5c = 12.8 mg/ltr
10c = 11.3
15c = 10.2
20c = 9.2
25c = 8.4
30c = 7.6
35c = 7.1

Personnly I like to get loads of air into my ponds reaching these levels, especially when a new pond, as it will assist with gassing off.

Do you have additional aeration? Or is the TT providing what you currently have?

[FowlPlayFarm]

Bob,

I have an alita air pump with a manifold going to a 8' airstone near the exit area of the settlement barrel, One 12' in the Bio-filter barrel and another 12' in the main pond underneath the TT for upflow through the TT. Obviously I also have the TT. Temp has been kept at 70F-72F, and I have been running 94%-100% on the O2 saturation.

Lester

[sundan]

Never use treated wood, has arsenic in it. First good rain you have or any moisture that drains into pond, say goodby to your koi. Cedar,teak work fine. Bug problem, PP 1 TEASPOON per 600 gals (hot mix, standby with hydrogen pexoide if you see any signs of stress, 1 cup per 1000 gals, be sure you bypass filter. You need a well. I went thru same headache you are having with city water. My first pond is 1500 gals and it took 5 hours to fill with city water. If you add all the money you will spend on declorine in the future, think smart, get a well.

Remember the $600 rebate Bush gave, I brought a well, smart money. You are building a large pond, well is a must. Good luck.