What are "cold water" and "warm water"?
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
Does a UVC clarifier harm useful bacteria?
Treating fin rot in a Koi
Forgot to switch the filter back on after feeding
Pressure filters in saltwater?
Fish become ill / Root smells bad
Position of the sera F 700
Can fish die even several days after a nitrite intoxication?
Is there a special sera salt for livebearers?
Nitrite levels remains at 0.3 mg/l for a longer time
Fish stock for a 60 cm aquarium
Hornwort floating at the surface?
How are fertilizer tablets optimally applied?
How can I regulate the suction with the sera gravel washer?
Severe infection of goldfish
Setting up an aquarium anew while it is in operation
How can I help a fish with unspecific symptoms?
Nitrite level remains very high for months
Black Widow Tetras (Gymnocorymbus ternetzi) spawned