Does a UVC clarifier harm useful bacteria?
Are clam and snail shells harmful in an aquarium?
What are "cold water" and "warm water"?
Is there a special sera salt for livebearers?
Water becomes cloudy after a water change
Can I also use tap water for preparing saltwater?
Quick or slow water flow in the filter?
How to decolorize a water sample
What to do in case of floating algae in the aquarium?
How can I lower the water hardness?
Air bubbles at the surface and cloudiness after setup
Does sera aquatan affect iron fertilization?
pH value remains below 6.5 even after a water change
Can I keep terrapins and fish together?
Available water is strongly polluted with iron
Conductivity of R/O water
No water changes while being away for three weeks? / Preparing food for vacation substitute
Sudden decrease of water quality and snail invasion
Water change rate and filter cleaning
Water cloudiness and bottom ground mix-up
Water smells bad
Is it possible that no elevated nitrite levels can be detected a few days after a nitrite intoxication?
Setting up a low-current tank for gouramis
Treating fin rot in a Koi
Forgot to switch the filter back on after feeding