Q: My water garden looked like pea soup so I treated it with AlgaeFix. The product worked great although it took its toll on my fish. My koi and goldfish began gasping at the surface. I immediately did a water change and only lost one small goldfish. I have used AlgaeFix for years and never had this problem. What went wrong? – Lisa of Georgia
A: Oxygen. Oxygen. Oxygen. You must be careful when treating for algae, especially pea green water or planktonic algae. AlgaeFix along with most algaecides on the market work very quickly. When the algae die, they begin to decompose immediately, robbing oxygen from your fish.
How to reduce your chance of fish loss:
#1 – Proper Aeration: Make sure you have an abundance of aeration before you treat for algae. Waterfalls, spitters and fountains all provide aeration. Although, the best source of aeration is generally an aeration system.
#2 – If treating for string algae, remove as much by hand as possible before any treatments. In the case of Lisa’s pea green water, I would have recommend that she do a 10-20% water change approximately 24 hours before her application.
#3 – Get to the root of your problems: Generally ,excessive algae blooms are caused by one or more realistically, a combination of the following: poor filtration, TOO MANY FISH or not enough aquatic plants.
#4 – Use natural products to provide clear water: Although chemicals, when used properly, are a helpful tool they should not be your only solution. For a healthy eco-system and more consistent clear water, turn to a natural remedy such as the DefensePAC and / or Barley Straw Extract.
Filed under: Algae Control, Koi & Goldfish, Oxygen Depletion, Pea-Green Algae, Water Gardens & Features Tagged: | fish gasping for air, fish kill, oxygen depletion, treating pea green algae, treating planktonic algae