Category: Freshwater

Many times I see bizarre swimming behaviors in my tank. For example, more than once, I caught my neon tetra swimming vertically. As the years passed, I learned why this issue occurs and how to deal...

Fish cannot speak; however, they do present behaviors that indicate that something isn't right. For example, quite a few times, I caught my molly fish swimming vertically. Over the years, I...

As an aquarist, I tend to measure the toxins in my tank. This way, I can prevent ammonia spikes, which can be extremely dangerous for fish. However, quite a few times, I measured 0.25 ppm of ammonia,...

Aggression among fish is a known issue. For example, I frequently noticed that my molly fish attack and bully other fish in my aquarium. Over the years, I learned why this issue occurs and how to...

Quite frequently, people ask me questions about different combinations in fish tanks. One of the most common ones is whether guppies and mollies can crossbreed. Over the years, I gained some...

I enjoy growing goldfish since they are quite hardy and can tolerate changing conditions. However, sometimes they present worrying issues. For example, there were times when I caught my goldfish...