50 Gal Pond Problems
I'm have a new outdoor pond, and could use some assistance.
I have a 50 gallon pond (preformed plastic) with a TetraPond FK3 Filtration Fountain (325 gph pump). I have two plants so far, a Raspberry Swirl Joseph's Coat (Alternanthera Raspberry Swirl) and a Pink Rain Lily (zephyranthes habranthus robustus) that were purchased as water plants from a local nursery. I have a small Barley Straw Bale to help keep the water algae free.
I've tested the water with Tetra EasyStrips (6-in-1 strips) and the pH, Nitrate, Nitrite, Hardness, Chlorine, and Alkalinity are all just fine. I also have tested the ammonia with an API test kit, and it comes back zero.
We've put a few goldfish in the pond so far, and they end up floating the next morning. We buy a couple more, and they do the same thing, sometimes lasting a day or so, but end up dying overnight. I'm confused what's going on. Could the plants be toxic, since the water is fine and the pump is circulating the water over 6x per hour? Or is there something i'm missing?