Terrible Advice Tuesdays (T.A.Tues.): The Lack Of These Ions Is Killing Your Fish


Terrible Advice Tuesdays (T.A.Tues.): Your fish is sick and/or dying because your calcium levels are low.

The rest of the story: I’ll make it really easy for you: Fish don’t care about what your tank’s calcium levels are. No where on my dying fish flow chart does it say “check calcium levels” because the calcium levels don’t matter for fish!  I’ll even expand on this statement to say that fish don’t care what your calcium, magnesium, strontium, iron, etc. levels are.

Don’t waste your time worrying about calcium levels if your fish are sick or dying as it is a complete waste of time.

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Comments for this article (4)

  • Mel says:

    That is very interesting. Body fluids are made up of sea water in the fishes body but yet the water make up does not matter. How about salinity and PH?

  • Bryan S says:

    Marine fish can survive a significantly wide range of parameters. More so than coral. The key is not to allow the parameters to change too rapidly which can cause fish to get stressed and that leads to illness or death. As long as the PH, temperature and salinity are within an acceptable range and do not fluctuate too much the fish should thrive.

  • Steven Hutcherson says:

    I have a 180gal tank with a 75gal sump tank. I’m re-doing my sump area (in garage) what info do you have available for re-doing in the 21st century?thanks, Steven

  • melody says:

    You are always so timely for me. Just yesterday I was discussing with a friend the fact that I had just lost my beloved clown fish. He told me I needed to check iodine, calcium,strontium etc. I said well I have a fowlr tank and that shouldn’t matter as long as parameters were steady according to Mr. Saltwater tank. Anyways thanks for the back up today.
    Rip Manny da clown….I miss ya

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