Aquarium Canary

  1. C

    Charlaboo Valued Member Member

    What would you say would be the most sensitive species of fish who would show the first signs of distress in a tank? I test my tanks often and do water changes twice a week, I'm not intending to willfully neglect my fish, but if someone wanted an aquarium canary, what would it be?
  2. APierce

    APierce Well Known Member Member

    I know of a saltwater "canary" but I'm unsure of any freshwater ones :)
  3. david1978

    david1978 Fishlore VIP Member


  4. Mcasella

    Mcasella Fishlore VIP Member

    Snails, they either try to escape or close up, mystery or nerite best here (trapdoor if you want but all I did was manage to kill them).
  5. Nataku

    Nataku Well Known Member Member

    Rummynose tetras.
    These peaceful schoolers are often used by angel and discus keepers as dithers and canaries. They have bright red noses when water quality is good. Their colors fade out fast and become very pale, the red like a faded washed out barely there pink when the paramters are bad.
  6. TheCrayfishGuy

    TheCrayfishGuy Valued Member Member

    otos. they will die of starvation in afew days.
  7. JLeeM

    JLeeM Well Known Member Member

    I second shrimp or snails. They are very sensitive to high nitrates.

    Very informative. I've been thinking about going with a school of these in my next build instead of cherry barbs. You just definitely tipped the scales a little more in favor of rummy noses.
  8. OP

    Charlaboo Valued Member Member

    Thanks everyone