How to Get Rid of Duckweed (And Keep It From Coming Back)
Duckweed usually shows up uninvited, hitchhiking on a new plant purchase, and it spreads faster than almost anything else in the hobby. Here's how to actually clear it out for good.
Why Is My Java Fern Melting? A Step-by-Step Diagnosis
Translucent, mushy, or blackening Java Fern leaves are almost always one of four specific causes. Here's how to tell which one you're dealing with, and what to actually do about it.
Thorea Hispida: The Algae That Probably Won't Survive Your Tank
Thorea hispida is a freshwater red algae that occasionally hitchhikes into aquariums on wild-collected rocks and driftwood. Here's how to identify it — and why it usually isn't the problem it looks like.
Black Beard Algae (BBA): The Most Notorious Algae in the Hobby, Explained
Dark, bristly tufts on leaf edges and hardscape are Black Beard Algae — the algae most consistently blamed on unstable CO2. Here's what actually causes it and how to beat it for good.
Brown Algae (Diatoms): The New-Tank Algae That Isn't Your Fault
A brown dusty film on the glass and substrate in a new tank is almost always diatoms — and it's one of the few algae types that clears up on its own as the tank matures.
Hair Algae: Why It Tangles Through Your Plants and How to Pull It Out for Good
Long green threads tangled through your stem plants and hardscape are Hair Algae — a nutrient-imbalance algae that responds well to manual removal, algae-eating shrimp, and out-competing plants.
Staghorn Algae: The Antler-Shaped Algae That Loves Unstable CO2
Stiff, gray-green branching tufts on leaf edges and equipment are Staghorn Algae — almost always linked to fluctuating CO2 or poor flow. Here's how to spot-treat it and stop it coming back.
Green Dust Algae: The Algae You Should Let Finish Its Cycle
A fine green haze on the glass that wipes away like chalk dust and clouds the water — Green Dust Algae is short-lived, but only if you let it finish its life cycle instead of fighting it every day.
Green Water: Why Your Tank Turned to Pea Soup
A tank that goes cloudy green overnight is a free-floating algae bloom, not a filter problem. Here's what triggers it and how to clear it without a UV sterilizer if you don't want to buy one.
Beating Algae the Natural Way: Identify Your Algae, Then Fight It
Algae isn't a moral failing — it's a symptom of more light or nutrients than your plants are using. Here's the general fix, plus links to identify and treat the seven algae types that actually show up in a planted tank.
Green Spot Algae: Why It Shows Up and How to Clear It
Hard green dots stuck to your glass and slow-growing leaves are Green Spot Algae — usually a sign of low or fluctuating phosphate paired with strong light. Here's the actual fix.
How to Get Rid of Pest Snails in a Planted Tank
How bladder, pond, and ramshorn snails hitchhike into a tank, how to knock down a booming population, and how to stop it from happening again.
Why Is My Aquarium Plant Dying? A Troubleshooting Guide
A calm, step-by-step way to tell normal transition melt from actual decline — and what to do about each.
Why Won't My Nerite Snail's Eggs Go Away?
Nerite snail eggs don't hatch in freshwater, but they don't disappear on their own either. Here's why they stick around and what actually gets rid of them.