Divide sera CO2-Tabs into pieces?
Total hardness for keeping Koi
Treating fin rot in a Koi
Water change rate and filter cleaning
pH value remains below 6.5 even after a water change
Quick or slow water flow in the filter?
Sand and gravel in combination? / How much sand is required?
Is sera siporax suitable for housing anaerobic bacteria?
Dosage of sera ectopur
How can I build a bypass filter for denitrification?
How large does an aquaterrarium for terrapins have to be, and what do I have to consider when setting it up?
Can I keep terrapins and fish together?
Which pump performance for a 230 liter aquarium?
Which pump is included with sera internal biofilter B 400?
Betta has no upper lip
Does a UVC clarifier harm useful bacteria?
How to change the filter felt of a sera air membrane pump
What can I do if goldfish multiply too strongly?
Nitrite levels remains at 0.3 mg/l for a longer time
Fish stock for a 60 cm aquarium
Setting up a low-current tank for gouramis
Which fluorescent tubes?
Which fluorescent tube in the front position?
Female Butterfly Cichlid attacks newly added male
Treatment of swim bladder infections
Can I use sera bio nitrivec in a stocked aquarium?
Conductivity of R/O water
How can I remove scratches in the aquarium glass?
Is it possible that no elevated nitrite levels can be detected a few days after a nitrite intoxication?
Nitrite level remains very high for months
Operating a CO2 system without nocturnal switchoff?