Lifeisgood Posted November 11, 2021 Share Posted November 11, 2021 I upgraded the size tank when we moved 2 1/2 months ago. Added some new pool filter sand and capped it with the old substrate—mulm and all. Used same plants, rocks and driftwood from old tank, hoping to keep the beneficial bacteria alive. I do not like to disturb the substrate much because I want the substrate to be enriched to feed the plant roots. I have been watching this white growth develop and hoped that it was benign and maybe useful for the ecosystem of the tank. But maybe I am letting things get carried too far in this direction? Can anyone tell me what this is and if I need to intervene and remove it for the health of my fish? Link to comment Share on other sites More sharing options...
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