I get it. Guppies is cheap and colorful. They’re the first fish that most people purchase.
Because of their flashy colors and calm behavior, they appear to be hardy little creature. Many of us has seen our recently acquired “pets” dwindle and perish in a matter of weeks, though. It is not because of the food we give them, but typicaly because of the aquarium’s water temperature.
Essential Water Temperature Guide for Healthy Guppies
Why Water Temperature Matters for Guppies
In nature, guppies are cold blooded animal and depend totally on surrounding environment for control of all bodily functions. If the water is too cold they will slow down because their metabolic rate will slow down as well. Immune response, digestion, and even their ability to breed depends on this.
For a guppy to be active and alive, temperature needs to be correct and it’s not just for comfort reasons. The right temperature are extremely important. Guppy’s optimal water temperature is between 74 and 82 degrees Fahrenheit.
That’s about as close as you can get to the warm tropical water they evolved from, down in South America. Seventy eight degrees is about right for most guppies. They are comfortable there.
Their metabolism functions well at this level, so they eat well and do not stress over it. It’s not the exact number that counts; rather it’s staying in that tight range. Yes, guppies will adapt to some changes but you want to be as consistent as possible.
The reason for stability is two-fold: (1) It avoids thermal shock caused by extreme variations in water change and (2) sudden temperature spikes or drops can weakens their immune system overnight. If they experience an abrupt shift, whether up or down, they’ll be susceptible to typical diseases such as fin rot or ich. Being consistent over time result in increased resistance.
Choosing the Right Aquarium Heater
To keep it stable, you need a heater. This is especially important during the colder months. The best heaters are submersibles.
They has a dial so you can set the exact temperature, and they don’t vary much (Eheim, Fluval, etc). Inexpensive heater will swing all over the place, which stresses your fish and makes them weaker over time. A good heater is well worth the investment in terms of healthier fish and fewer trips to the veterinarian.
Using an Accurate Thermometer
The other thing is equal to the heaters themselves, thermometers.
You can pick up digital stick on ones at your local store. Many of them aren’t accurate. They don’t actualy measure the water because they’re outside the glass, measuring the ambient air temp instead.
A reliable heater and an old fashioned analog glass thermometer are both essential, as it’s easy to put the thermometer into the tank to get an accurate reading. Good decision making requires good data so if you trust bad data, guess what? You made a bad decision.
Temperature Effects on Breeding
Check the water temperature! Water temperature has a direct impact on breeding. Yes, guppies is prolific breeders.
But they won’t do it unless the water is warm. Cool water will cause females to abort broods (at least temporarily) or hold onto them for weeks at a time. The warmer your water is, the faster the gestation period and more likely the fish are to spawn.
To get fry, shoot for the high side of the range, about eighty degrees. Lower temperatures suspends reproduction.
Risks of Overheating Your Tank
On the other hand, warm water decreases dissolved oxygen levels.
It’s simply unable to hold as much than cool water can. Push it beyond eighty-five degrees and you’re risking suffocation for your fish. They’ll start to gasp at the surface, a telltale indicator they’re not happy.
Higher temperatures accelerate decay (food will spoil more quickly) and encourage rapid bacterial growth. Counteract the warmth by ensuring proper filtration and aeration.
Acclimating New Guppies Safely
The last important thing to consider, though, is acclimating.
Most likely your tank water doesn’t match the temperature of the store water you’re taking the guppies out off. Float the bag in your tank (sealed) for 20 min and then open up the bag. The slow gradual change in temperature will balance out.
Placing them straight from shock into your tank water is instant stress. Take a breath and go slow here…It’ll save lives. Water is easy to manage but not optional.
All it takes is some attention, a good heater, and an accurate thermometer. Keeping the water stable and warm creates the foundation for a great environment for your guppies. In return, they’ll reward you by bringing life, movement, and color into your tanks.
Warm water equals a healthy tank.
