Fish Gasping at Surface: Oxygen, Ammonia and Temperature
Fish gasping at surface means one of exactly two things: there is not enough oxygen...
Fish Care & Health
Cloudy Fish Tank After Water Change: What Actually Happens
Cloudy fish tank after water change is one of the most common questions in the...
Why Is My Aquarium Water Cloudy? Causes and How to Fix It
Why is my aquarium water cloudy has four common answers, and the colour of the...
Safe Nitrate Level for Freshwater Fish: Targets and Limits
Safe nitrate level for freshwater fish is the one nitrogen number that comes with a...
Safe Nitrite Level in Aquarium Water: Why It Has to Be 0
Safe nitrite level in aquarium water is zero, with no tolerance band beneath it. Nitrite...
Safe Ammonia Level in Fish Tank Water: Why Zero Means Zero
Safe ammonia in a fish tank is 0 ppm. Act with a water change at 0.25 ppm, and remember the same reading is more toxic at higher pH and temperature.
How to Increase Aquarium Hardness: Safe Step-by-Step Fix
How to increase aquarium hardness is really two jobs, not one: raising GH feeds your...
How to Raise Aquarium pH Safely: Fix the Buffer, Not the pH
How to raise aquarium pH safely almost always means raising carbonate hardness instead, because a...
How to Lower Aquarium pH Safely: Methods That Actually Hold
How to lower aquarium pH safely starts with a question worth answering honestly: does it...
Aquarium pH Guide: What It Means and When to Leave It Be
Aquarium pH guide advice usually starts with a target number, which is where most pH...
Ideal Aquarium Water Parameters: Targets and Action Points
Ideal aquarium water parameters are a set of ranges rather than a single correct number,...
Nitrite Spike in New Aquarium: Why It Happens and What to Do
Nitrite spike in new aquarium tanks is not a fault, it is the middle of...