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Q: I have a fish only freshwater tank and need to lower my pH. I am afraid to use Discus Buffer™because it contains phosphates. What should I do?
A: Phosphate is nothing to be concerned with in a fish only system. Phosphate concerns are a &
16;carry over' from reef keepers where even a small amount of phosphate can present problems for many corals. It is really an insignificant property in freshwater systems unless it is a planted tank with a very intense lighting system. If you are still concerned about phosphate causing algae problems in a fish-only tank, rest assured that phosphate in itself does not cause algae; algae requires light that is in the blue spectrum for photosynthesis. Standard aquarium light is weak in the blue spectrum and strong in the red range and does not easily support algae growth. This makes the colors on fish seem brighter. It also makes brown fish look more red.
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