Jo Todd Posted November 5, 2023 Report Share Posted November 5, 2023 We've made a pond out of a small spa lined with pond plastic it's around 1000lt. The pond has no outlet so we siphon off and replace water.... I've been using the pond conditioner called Microbial algae clear. The water is quite green there is no algae but it seems murkier each week. The fish are happy, not looking for air and feeding well So do we have a problem or is green water normal. Quote Link to comment Share on other sites More sharing options...
livingart Posted November 6, 2023 Report Share Posted November 6, 2023 The green water is algae Green pond water is caused by tiny floating algae, which grow explosively. Additional effects are low CH value, high pH value and stagnation in growth of oxygen producing plants. Green pond water frequently occurs in newly built ponds containing water rich in food. https://pondaquariumproblemsolver.co.uk/problem/blagdon/green-water-2/ Quote Link to comment Share on other sites More sharing options...
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