In a thread on the "Walstadt Method" Tom said, in part:
Quote:
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. . . The method works, not doing water changes, rich or nutrient poor substrates work well, less nutrients= more required from the water column to support continued plant growth etc. Moderate to low light, lots of plants from the start, algae eaters etc. . .
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From that and other posts I assumed that water changes in low light tanks, with or without CO2 injection, should be avoided, mainly because of the danger of introducing excessive nutrients, such as ammonia, with the new water and causing algae outbreaks.
But in this thread Tom said,
Quote:
Excel will help about 50% less than CO2 for this light level. You should do pretty well.
Give it a week etc, but add ferts etc(2x a week at about 1/2EI levels).
Plan on doing water changes.
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So obviously I am confused, not a rare state for me. EI does require water changing, of course, but in a light-limited tank such as the one under discussion is the plant growth going to be robust enough to require that much dosing?
Thanks.
Bill
Thanks.
Bill