We quarantine all livestock except invertebrates. We have never experience invertebrates bringing disease in our display tanks, but it never hurts to quarantine invertebrates for 2 weeks too, if not for observation.

Procedure for fish quarantine
All you need is a 2.5g, 5g or 10g tank for quarantine depending on the size of your fishes. For larger fishes, you may consider a 20g long tank. You can add a sponge filter, an outside hand-on filter, and any media that will hold a bacteria bed. I usually have an extra sponge filter running in the sump of my holding tank system, so I can add easily to a new setup quarantine tank and the sponge is already full of bacteria. For the hang-on filters, you can always keep extra media in the sump of your display tank, so it is ready to be used for quarantine at any time.

After acclimating new livestock into the quarantine tank, this is our standard bio-security procedures for quarantine.

  • Day 1
    add Hikari PraziPro (praziquantel) to quarantine tank to eliminate any internal worms or parasites. PraziPro is safe and mild and won’t affect fishes, even under shipping stress.
  • Day 2
    if fishes have acclimated well and none of the fishes seem excessively stressed or breathing heavy, add 10mg/L chloroquine phosphate solution to the quarantine tank and this is used as a preventive against ich, marine velvet and brook. If fish are still breathing heavy, do not add chloroquine phosphate today, but add API General Cure (metronidazole and praziquantel) to tank as this usually removes any parasites that maybe in the fish gills and calms the fishes.
  • Day 3 onward
    if any diseases show up, increase chloroquine phosphate dosage to 15mg/L, which will eradicate the disease. Our standard practice is to us 15mg/L solution at all times.
  • Day 4 – 14
    leave fishes for minimum 4 weeks for observation and be sure they are eating properly before introducing to display tank.  We quarantine all our fishes at least 2 – 3 months before transferring.  Note that chloroquine phosphate is harmful to corals and invertebrates, so should only be used in a fish only, quarantine or hospital tank.

Here’s some information the led us to switch from other quarantine methods to using chloroquine phosphate.  We found chloroquine phosphate much more safer to use than copper or other medications like formalin, which you have to be careful not to over dose as well as check solution daily.  If you need chloroquine phosphate, check it out in our store.

Aquarium Fish: Chloroquine: A “New” Drug for Treating Fish Diseases