One of the more common “healthy” pet issues we see in all of veterinary medicine is obesity, and fish are no exception. They may have better control than your golden retriever, but overfeeding your fish can have more severe consequences than just rounder fish.
Unfortunately, there is no absolute calculation to tell you how much to feed your fish. It depends on their species, temperature, water quality, other stressors, the type of food, formulation and current disease processes. For cats and dogs, it all depends on body size and life stage. If you take any bag of cat or dog food and look at the back, it will tell you what life stage the food is intended for and what amount to feed for body weight. (This assumes that your pet is the correct weight for the body type and structure.) But when was the last time you weighed your pet fish? Fish should be fed based on body size, but we know this is an impossible task for most owners. Thankfully, fish are pretty good at determining when they are full. A bigger problem is what happens when there is too much food in the tank.
So what should I do to ensure my fish are not overfed? We recommend using the 5-Minute Method. It is very simple:
Sprinkle a little bit of food into your tank. We recommend mixing it close to the filter return so all fish can get a fair share.
When all the food is eaten, sprinkle a little bit more. If the food is not completely consumed, WAIT.
Continue for 5 minutes or until the fish stop eating.
NOTE: Some species, like betta fish, are not great at regulating their intake. Keep in mind that their stomachs are about the same size as their eyeballs. Only a few pellets once or twice a day is adequate!
Why does this method work?
The biggest problem with overfeeding a fish tank is not just fat fish, but increased stress on your biological filtration. The breakdown of fish food, since it contains a lot of protein, causes an increase in the ammonia levels in your tank. Using this method makes sure that the food ends up in the fish, not the bottom of their tank. If you’re unfamiliar with ammonia and the nitrogen cycle, read this explanation.
For more information on fish food in general, watch our webinar.
You have a plan, you got your tank and all the additional items, so it’s time to add the fish! But how many fish do you add? In what order do you add them? In the beginning, your biggest hurdle will be establishing your nitrogen cycle. This cycle is made up of commensal bacteria living in your substrate and biological filtration media (sponges, matting, bio balls, ceramic cubes etc). These helpful bacteria convert the primary fish waste of ammonia into nitrite and from there into nitrate. Ammonia and nitrite are highly toxic to fish, and can cause lethargy, loss of appetite and death.
When a tank is brand new, the bacteria have not been colonized. There are many commercial starters promising to “instantly start” your tank, but they are the aquatic equivalent to snake oil. Our office tested over half a dozen of these products with no decrease in time to conversion. You do NOT need to add these products to your tank, they will come with the fish; they just take time to become established. It will take 4-6 weeks for your tank to go through all the necessary steps to become established. If you follow your tank’s progression with your water quality testing kit, you will yield a graph like this:
You will see spikes in ammonia, nitrite and then nitrate. When you see this DO NOT PANIC. It is a normal occurrence in EVERY new fish tank. It is called “New Tank Syndrome” and there is no way around it unless you have another established tank with similar water parameter requirements that you can steal some filter media from.
The best way to combat New Tank Syndrome and avoid crashing your tank with a major ammonia spike is by starting with just a few fish in your new tank. Start with one or two goldfish or 3-4 tropicals, like zebrafish or tetras, before your tank is established. Slowly increase your fish levels from there and you will never have an issue.
Be patient! It is extra work, but I guarantee by following these steps, you will not lose a fish from New Tank Syndrome. Buy a test kit, know how to use it and don’t panic when those spikes hit. By having fewer fish in a larger volume of water, you will produce a smaller, more tolerable spike, keeping your fish alive.
It’s almost that time of year again, where many families will be bringing new pet fish into their homes as holiday presents. Unfortunately, many of these new endeavors tend to end disastrously. But this doesn’t have to be the case for YOU! With our helpful guide, your fish can live a long a happy life.
Plan ahead. We all know the thrill of walking into the pet store and loading up on everything a fish could possibly want. You can still get that rush, but go in with a plan. Read this checklist to make sure you have everything you need to keep your fish happy for those first few critical weeks of life. Here’s how to set everything up once you’ve worked through your checklist.
Understand how tank cycling works. New tank syndrome is the downfall of many holiday fish systems. By starting with a low bioload for the first few weeks, you will save yourself the hassle of having to start over. Buy a reliable test kit and watch your parameters closely.
Ask for help when you feel overwhelmed, and this does NOT mean scrolling through the internet! There is a TON of misinformation on the internet. Call your local fish professional and have their number ready, just in case. Our office fields calls from all over the country on a daily basis for people needing help with the next step. Call us if you need help –> (831) 728-7000.
By working through these 5 simple steps, you have ensured your holiday fish will be a member of the family through the next holiday season. Need more? Be sure to read through our Top 10 Mistakes All New Fish Owners Make.
And flushing dead fish is NOT a sanitary method of disposal. After you have made sure they are dead, through prolonged drug exposure or cervical spine separation, place dead fish in the trash or bury them at least 12″ in the yard. Putting almost dead fish in the freezer is not humane.
Thinking about adding a new tank to your home or business? Make sure you have everything you need before you get started. Print this list and bring it with you to the store to make sure you don’t forget anything.
BEFORE YOU GET STARTED: What kind of tank do you want? How big of a tank can you comfortably fit? What kind of fish do you want to have? How many fish of that type can your newly described tank hold? Sorry, but the 1″ of fish per gallon rule does NOT work. Research your species and understand what environment works best for them BEFORE you buy ANYTHING!
Check List for New Tank
_____ Fish tank of _______ gallons
_____ Table that can hold ______ gallons fish tank (1 gallon of water = 3.78 kg or 8.34 lbs)
_____ Lid for tank with light
_____ Filter capable of volume 1.5x ______ gallons (canister or hang-on)
_____ If tank is >30 gallons, consider adding aerator or powerhead to improve water flow
______ Substrate (gravel, rocks, sand, etc.)
______ Gravel vacuum
______ Decor items (must be FISH SAFE) – for bettas, stick with items that will not snag fins
When you live in a toilet, like fish do, it’s critical to have a well-functioning immune system. Being ectotherms, fish rely on the temperature of their surrounding environment to dictate their metabolism and immune function. Cold water = limited activity. Warm water = more activity. Hot water = poached. All things considered, a fish’s immune system may be more complex that you give them credit for.
In addition to basic phagocytosis, fish produce B and T lymphocytes. These cells are responsible for antibody production and are the reason why we are able to make vaccines for fish. Vaccines can be given orally, topically, by immersion, or through injection, like your flu shot. Most vaccines are available for aquaculture production and are not used on pet fish. For more information on vaccines in fish, read here.
Mammals produce their white blood cells in their bone marrow. Fish do not have bone marrow and rely on their kidney and spleen to produce blood cells. These cell lines have similar functions to mammalian white blood cells.
A fish’s response to stress has a direct effect on their immune system. When a fish is stressed due to lack of nutrition, bullying, poor water quality, sound irritation or multiple other causes, they release hormones into their bloodstream, specifically cortisol, epinephrine and norepinephrine. These hormones initiate an animal’s “fight or flight” reflex, causing secondary changes in blood glucose, lactate, liver and muscle glycogen and osmolality. Over time, these chemical changes cause tertiary changes to behavior and performance, including digestion, reproduction, and immune function.
Acute stress is beneficial where it helps a fish get out of a stressful situation. Chronic stress, however, leads to long-term immune suppression and increased vulnerability to disease.
In order to maintain good immune function, use these key prevention and management strategies:
Sounds simple? Do it right and keep your stress minimal!
Wash your hands and arms to your elbows.
Unplug filter and lights. If you have any UV lights, unplug those too. Close any valves if you have a sump so it doesn’t overflow.
Remove any synthetic decor and scrub it with hot water and a designated toothbrush.
Clean the glass with an appropriate acrylic-safe or glass scrub.
Use a gravel vacuum to get into the substrate crevices. Do not remove more than 50% of the tank water at a time. Your fish can stay in the tank, just don’t suck them up!
Remove filter media and rinse gently or squeeze in collected bucket of waste water. Do NOT use tap water. The chlorine can kill your good bacteria. Your filter media does NOT have to be pristine and sparkling. Again, super clean media will reset your biologic filter to ZERO. You do NOT have to replace your filter media every month. If your filter media is falling apart, do not replace more than 1/4-1/3 of the total media at a time. We recommend using sturdy sponges over floss.
Use your waste water to feed your plants. The nitrates make great fertilizer!
Re-fill your bucket with tap water. Bottled water can be missing buffers and/or minerals. Make sure it is the same temperature as your tank! An infrared thermometer is great for quickly comparing two temperatures.
Add dechlorinator to your bucket of water and decor that treats chlorine AND chloramine. Chloramine is a more stable form of chlorine mixed with ammonia! Allow a few minutes for the dechlor to do its job.
Replace your decor back in your tank and pour in your treated water. You may need to adjust your decor after adding the water.
Prime your filtration by pouring some tank water into the filter base. Plug in and adjust flow accordingly. Open any valves you previously closed.
Turn on your lights and replace any covers. Watch your tank for a few minutes to make sure everything is working properly.