Starting this off with a disclaimer: I think quarantine (QT), like many things in reefkeeping, is a matter of personal tolerance for risk and balancing your enjoyment of the hobby. This guide is not meant to be judgmental, or to argue people cannot have success in their tanks without QT. It’s meant to provide a guide for someone who’s considering QT to learn the why, the what, and the general ‘how’ of QT.
Part One: To QT or not to QT?
I would wager my story is a familiar one in reefing: I started with a small tank before upgrading. My new tank was bigger, so I added more fish. Everything was going well, until one day it wasn’t, and a disease outbreak (velvet) wiped out the tank. While it’s important to note this doesn’t happen to everybody, it can happen to anyone—just like it happened to me.
This sparked my interest in fish health, disease treatment, and the eventual decision to do a fully-quarantined display tank. However, it took a lot of digging and research to get a better idea of what to do, so I decided to make this guide.
The purpose of this guide is not to discuss the nitty gritty details of setting up a QT system. Instead, it’s meant to provide a higher-level view of why you may (or may not) want to consider a QT system, the various approaches and alternatives you can take to setting one up, and—in general—to give you the resources you need to answer the question, “Is it worth it to me?”
So why should I consider a QT’d system?
Maybe you heard QT can be healthier. Maybe you're like me and had disease wipe out a tank. Maybe you take BAR’s mission statement super seriously. Whatever your reason, the general ‘why’ of considering a QT system usually falls under:
These diseases can range from uncomfortable (skin and gill flukes that cause scratching and flashing behavior in fish), to outright deadly (marine velvet causing fish to rapidly suffocate). They can also take away from your enjoyment of the hobby, when treatment protocols can be merely annoying (medicating your fish’s food) to maddening (having to pull every fish from your tank, put them in a separate tank, treat with a cocktail of medications, and keep them alive for 76 days until the disease starves in your tank).
While most things get easier in a larger system, dealing with diseases is not one of them. The larger your tank, the larger the risk becomes. Each new addition represents not only a potential vector, but also increases the ‘cost’ of failure if there’s a disease outbreak that you decide to treat (more QT tanks required, more expense to replace fish, etc.)
Additionally, some fish that are common in larger systems—particularly tangs, and especially acanthurus tangs (achilles, powder blue, powder brown, etc)—are highly prone to marine ich and marine velvet, two of the most difficult diseases to treat (and, in the case of velvet, one of the deadliest). Other fish, such as the common blue-green chromis, are frequent carriers of uronema.
It’s important to note that no quarantine protocol is 100% effective. However, when done properly, it does help prevent the overwhelming majority of these diseases and can result in healthier fish overall.
Price considerations
While I believe the health of the animals under our care is the most important reason to quarantine, I’m going to focus purely on the financial aspect to start. This is because, in my experience, people tend to be extremely price-sensitive when it comes to quarantine.
Setting up and running a QT system is more costly, both in terms of money and energy, than a normal system. Similarly, purchasing pre-QT’d fish will be more expensive than purchasing “conditioned” or non-quarantined fish. More sensitive and/or more difficult to QT fish (copperband butterflies, moorish idols, etc) will be proportionally more expensive.
While the upfront costs are higher, I encourage you to weigh them against the costs of replacing livestock lost due to disease (to say nothing of the emotional aspect of losing animals you care about). Weigh not just the price difference of a quarantined fish, but how much it would cost to replace that fish, and how willing you are to take that risk.
With that being said, the specific requirements will vary depending on the type of quarantine that’s chosen. In the next sections, I’ll cover observation versus management versus quarantine, the pros and cons of each, and what they require.
Part One: To QT or not to QT?
I would wager my story is a familiar one in reefing: I started with a small tank before upgrading. My new tank was bigger, so I added more fish. Everything was going well, until one day it wasn’t, and a disease outbreak (velvet) wiped out the tank. While it’s important to note this doesn’t happen to everybody, it can happen to anyone—just like it happened to me.
This sparked my interest in fish health, disease treatment, and the eventual decision to do a fully-quarantined display tank. However, it took a lot of digging and research to get a better idea of what to do, so I decided to make this guide.
The purpose of this guide is not to discuss the nitty gritty details of setting up a QT system. Instead, it’s meant to provide a higher-level view of why you may (or may not) want to consider a QT system, the various approaches and alternatives you can take to setting one up, and—in general—to give you the resources you need to answer the question, “Is it worth it to me?”
So why should I consider a QT’d system?
Maybe you heard QT can be healthier. Maybe you're like me and had disease wipe out a tank. Maybe you take BAR’s mission statement super seriously. Whatever your reason, the general ‘why’ of considering a QT system usually falls under:
Diseases suck, both for the animals in our care and the hobbyist caring for them, and quarantine helps prevent them
These diseases can range from uncomfortable (skin and gill flukes that cause scratching and flashing behavior in fish), to outright deadly (marine velvet causing fish to rapidly suffocate). They can also take away from your enjoyment of the hobby, when treatment protocols can be merely annoying (medicating your fish’s food) to maddening (having to pull every fish from your tank, put them in a separate tank, treat with a cocktail of medications, and keep them alive for 76 days until the disease starves in your tank).
While most things get easier in a larger system, dealing with diseases is not one of them. The larger your tank, the larger the risk becomes. Each new addition represents not only a potential vector, but also increases the ‘cost’ of failure if there’s a disease outbreak that you decide to treat (more QT tanks required, more expense to replace fish, etc.)
Additionally, some fish that are common in larger systems—particularly tangs, and especially acanthurus tangs (achilles, powder blue, powder brown, etc)—are highly prone to marine ich and marine velvet, two of the most difficult diseases to treat (and, in the case of velvet, one of the deadliest). Other fish, such as the common blue-green chromis, are frequent carriers of uronema.
It’s important to note that no quarantine protocol is 100% effective. However, when done properly, it does help prevent the overwhelming majority of these diseases and can result in healthier fish overall.
Price considerations
While I believe the health of the animals under our care is the most important reason to quarantine, I’m going to focus purely on the financial aspect to start. This is because, in my experience, people tend to be extremely price-sensitive when it comes to quarantine.
Setting up and running a QT system is more costly, both in terms of money and energy, than a normal system. Similarly, purchasing pre-QT’d fish will be more expensive than purchasing “conditioned” or non-quarantined fish. More sensitive and/or more difficult to QT fish (copperband butterflies, moorish idols, etc) will be proportionally more expensive.
While the upfront costs are higher, I encourage you to weigh them against the costs of replacing livestock lost due to disease (to say nothing of the emotional aspect of losing animals you care about). Weigh not just the price difference of a quarantined fish, but how much it would cost to replace that fish, and how willing you are to take that risk.
With that being said, the specific requirements will vary depending on the type of quarantine that’s chosen. In the next sections, I’ll cover observation versus management versus quarantine, the pros and cons of each, and what they require.
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