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Results 1 to 5 of 5
  1. #1

    Default What should phosphates read?

    0 Not allowed!
    Where I lived before here, I had phosphates levels of 2 always. I was happy to move hoping they would be lower, but nope. Here as well. Well, darned if I didn't test my water yesterday and they are now .25..... right out of the faucet.

    Could this be what caused this explosion of BBA suddenly? And what in heck made the phosphate drop? I don't even know what they should be. DOH!

  2. #2


    0 Not allowed!
    Imbalances will cause algae. I think a phosphate of 1 would be more than adequate for any tank.

  3. #3

    Join Date
    Feb 2010
    Ypsilanti, Michigan

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    0 Not allowed!
    As I understand it, municipalities periodically tinker with their water supply, or change sources, or borrow water from another district. Your water utility (assuming you're not working off of a well) may have changed something, resulting in a change of phosphate levels.

    I thought phosphates were food for algae though, so I don't know why a reduction in phosphate levels would lead to an increase in algae.
    300 gallon mega tank: sailfin pleco, clown loaches, silver dollars, roseline sharks, congo tetras, new world cichlids
    125 gallon office tank: Africian cichlids, synodontis catfih
    75 gallon community tank: bolivian rams, black skirt tetras, dwarf neon rainbowfish, corys, harlequin rasboras, otos, bristlenose and bulldog plecos, assassin snails, various shrimp
    60 gallon goldfish tank: fancy goldfish

  4. #4


    0 Not allowed!
    Plants need potassium, phosphate, nitrogen, carbon and light to grow. If there is a lack of one they will not grow as well. Algae is more adaptable to less than perfect conditions. If something is not right the algae will grow better than the plants do. When the plants have all they need they grow well and algae is kept at a minimum.

  5. #5


    0 Not allowed!
    I suspect you are so right rich. I have always fought with these phosphate levels due to diatoms but never had BBA other than tiny patches that peroxide took care of. Apparently these phosphates dropping like that triggered this imbalance.

    Planted tanks shouldn't have to require a scientic mind and test kits of everything. *sigh

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