How to decolorize a water sample
Is it possible that no elevated nitrite levels can be detected a few days after a nitrite intoxication?
Can fish die even several days after a nitrite intoxication?
Nitrite level remains very high for months
Nitrite levels remains at 0.3 mg/l for a longer time
pH value remains below 6.5 even after a water change
Using the sera nitrite-Test
Algae problems with very low nitrate and phosphate levels
Water becomes cloudy after a water change
What are "cold water" and "warm water"?
How does sera aquatan work against heavy metals?
Can I also use tap water for preparing saltwater?
How can I lower the water hardness?
What to do in case of floating algae in the aquarium?
Quick or slow water flow in the filter?
Conditioning R/O water with sera mineral salt for angelfish
What are the consequences of very high silicate levels?
Air bubbles at the surface and cloudiness after setup
Can I keep terrapins and fish together?
What can I do against cloudiness?
Water change after/during a sera costapur treatment
What does "NO2-N" mean?
Conductivity of R/O water
Biofilm on the surface
Does sera aquatan affect iron fertilization?
Available water is strongly polluted with iron
Fish stock for a community tank / Salt in the 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
Setting up a low-current tank for gouramis
How can I hibernate goldfish living in a pond indoors?
Treating fin rot in a Koi