Today we are elaborating the whole algae issue in our orchid pots. So are they good for our orchids r rather bad?
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Well first of all we need to know what algae are https://en.wikipedia.org/wiki/Algae and afterwards, based on the fact that they photosynthesize https://en.wikipedia.org/wiki/Photosynthesis we can draw the conclusion that they also produce and consume oxygen.
The problems start when algae are excessive and create what we call an algal bloom https://en.wikipedia.org/wiki/Algal_bloom that can lead to depletion of oxygen through decomposition. It is easy to see that a bit of algae will not so much harm, but a lot of them certainly can!
In my experience I have also noticed that algae don;t form where we want them to form in order to oxygenate orchids. In the root ball or in the water reservoir there are little to no algae at all, but there sure are plenty right above the reservoir, where oxygen is in high amounts. So why keep algae to oxygenate, if they don’t like to live where we would want them to oxygenate?
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