- "Crystal Red" shrimps in a 25 liter aquarium [more]
- "Moss balls" / Food amount [more]
- Algae problems with very low nitrate and phosphate levels [more]
- General information about Bumblebee Gobies (Brachygobius xanthozonus) [more]
- Amyloodinium (Oodinium) upon adding new fish [more]
- Ancistrus catfish has large white blotches [more]
- Using the sera nitrite test kit [more]
- Using sera aquatan if water changes are conducted without a bucket [more]
- Can I keep aquarium fish in a pond during summer? [more]
- To which height is the outlet of an internal filter adjusted? [more]
- Conditioning during water changes / Which values should be checked, and when? [more]
- Conditioning saltwater for shrimps [more]
- Increasing the hardness of R/O water for Central American fish [more]
- Bloated eye on a Siamese Fighter [more]
- Available water is strongly polluted with iron [more]
- Does sera aquatan affect iron fertilization? [more]
- Treating a bacterial infection in a pleco catfish/Combination of sera baktopur and sera baktopur direct [more]
- Treating fin rot in a Koi [more]
- Treatment of skin flukes in fancy guppies [more]
- Treatment of Ichthyophthirius (white spot disease) with sera costapur F [more]
- Treatment of swim bladder infections [more]
- Add hatchetfish to existing fish stock? [more]
- Lighting time in an aquarium? [more]
- Fish stock for a 60 cm aquarium [more]
- Fish stock for a community tank / Salt in the water [more]
- Fish stock for a Lake Malawi aquarium / Slimy layers [more]
- Fish stock with Neon Tetras and catfish in a 60 cm aquarium [more]
- Fish stock questions for a 190 liter aquarium [more]
- Do Otocinclus (Midget Sucker Catfish) damage plants? [more]
- Operating a CO2 System without nocturnal switchoff? [more]
- Does sera phosvec bind phosphates permanently, or can they get back in solution in the aquarium? [more]
- Biological activation delayed by filter 'cleaning' [more]
- Black Mollies have protruding eyes and skin slime [more]
- Blue-green algae/Cyanobacteria [more]
- Bottom gravel is clogged by sludge [more]
- Brown layers on plant leaves / Diatoms [more]
- CO2 dosage [more]
- Discus and Altum Angelfish together? [more]
- Pressure filters in saltwater? [more]
- Eggs or sporangia on Java fern? [more]
- Are Butterfly Cichlids suitable predators for Guppy babies? [more]
- Is sera siporax suitable for housing anaerobic bacteria? [more]
- A few questions about Spot Finned Spiny Eels (Macrognathus aculeatus) [more]
- Setting up a low-current tank for gouramis [more]
- Female Pearl Gourami is strongly bloated on one side [more]
- Does "ironwood" contain iron that can be taken up by plants? [more]
- Does sera blackwater aquatan contain formaldehyde? [more]
- Replacing an aquarium with a bigger one [more]
- First fish stock for a 60 centimeter aquarium [more]
- Rot zones in the bottom gravel [more]
- Keep Firemouth and Convict Cichlids (Thorichthys meeki/Cryptoheros nigrofasciatus) together? [more]
- How to change the filter felt of a sera air membrane pump [more]
- Filter performance goes down very quickly, water becomes cloudy [more]
- Fish as snail removers? [more]
- Fish become ill/Root smells bad [more]
- Fish have scratches [more]
- Does the sera blue sky support algae growth, and is it suitable for planted aquariums? [more]
- Questions about stocking a new 200 liter aquarium [more]
- Questions about breeding Colisa lalia (Dwarf Gourami) [more]
- Is it sufficient to only agitate the surface but not aerate the water? [more]
- Total hardness for keeping Koi [more]
- Gender differences in Labidochromis sp. "Yellow" [more]
- Gender differences and fin filaments in angelfish [more]
- Swollen eye and abnormal swimming position [more]
- Ulcer on a dwarf gourami [more]
- Is there inbreeding in fish? [more]
- Is there a special sera salt for livebearers? [more]
- Goldfish got stuck, caudal fin is torn [more]
- Do Siamese Fighters attack Guppies? [more]
- Green algae in an East Africa aquarium / Which fluorescent tubes? [more]
- Green algae only in the stronger lighted part of the aquarium [more]
- Guppy-like fish with orange and black pattenr - which species is this, and how can I keep them? (Endler's livebearer) [more]
- Juvenile Guppy has a distorted spine [more]
- Can I keep male Guppies without females? [more]
- Loricariids eat plants [more]
- Skin changes during treatment against Costia/Ichthyobodo [more]
- Hornwort free floating at the surface? [more]
- Jumping animals on the water surface / Springtails (Collembola) [more]
- I have a specific question to which I do not find an answer in the FAQ section [more]
- Internal filter sera F 400 - is it possible to redirect the water current? [more]
- Is a CO2 reactor required for CO2 fertilization? [more]
- Is additional mineral fertilization required if I already use CO2? [more]
- Is a CO2 system by all means necessary? [more]
- Is it normal that Altolamprologus calvus grow very slowly? [more]
- Is it normal that hornwort does not grow roots? [more]
- Is it normal that new plants discard leaves? / Is it necessary to remove rock wool? [more]
- Is it normal that sera baktopur direct tablets dissolve rather slowly? [more]
- Is it normal that the tablet quickly dissolves within the sera CO2 Start reactor? [more]
- Is gravel with 3 - 6 mm grain size suitable? [more]
- Is another nocturnal switchoff required in addition to the seramic CO2 control unit? [more]
- Biofilm on the surface [more]
- seramic calibration: Can you use pH 4 instead of pH 9? [more]
- Betta has no upper lip [more]
- Can the carbonate hardness be higher than the total hardness? [more]
- Can the currents also be too strong? [more]
- Can an aquarium be planted too densely? [more]
- Is it possible that no elevated nitrate level can be detected a few days after a nitrite intoxication? [more]
- Is it possible that Ancistrus catfish attach themselves to other fish? [more]
- Can I also use tap water for preparing saltwater? [more]
- Is it possible to keep only female Platies in order to avoid reproduction? [more]
- Can I keep a tortoise in a discarded aquarium? [more]
- Can I use flintstone in an aquarium? [more]
- Can you use magnets for attaching things in an aquarium? [more]
- Can I use sera mycopur and sera baktopur direct together? [more]
- Is it possible to crush sera siporax? [more]
- Can I use sera bio nitrivec in a stocked aquarium? [more]
- Is it possible to use sera floredepot together with an undergravel heater? [more]
- Completely new setup after algae trouble? / Snails in the aquarium [more]
- Can fish die even several days after a nitrite intoxication? [more]
- Can fish change their gender? [more]
- Can sera fluorescent tubes be dimmed, and what must be considered? [more]
- Do different Corydoras species cross-breed? [more]
- Live rock from the Mediterranean Sea: Which salinity? [more]
- Life expectancy of Corydoras catfish [more]
- Neon tetras with bloated bellies [more]
- Conductivity of R/O water [more]
- Fluorescent tube does not work when switching it on [more]
- Air bubbles at the surface and cloudiness after setup [more]
- Mollys apparently do not multiply [more]
- Breeding Platies / Fish stock questions [more]
- Neolamprologus brichardi offspring / Does Synodontis petricola show cuckoo behavior? [more]
- Neon disease [more]
- Neon tetra floats helplessly at the surface [more]
- Neon tetras, butterfly cichlids and shrimps together? / Filter media [more]
- Newly added plants turn yellow / Leaves decompose [more]
- Newly added Cardinal Tetras are pale [more]
- Setting up an aquarium anew while it is in operation [more]
- New gourami attacks older ones [more]
- Nitrate breakdown with sera siporax: What kind of filter is suitable? [more]
- Nitrite levels remains at 0.3 mg/l (ppm) for a longer time [more]
- Nitrite level remains very high for months [more]
- Open wound on the head of a terrapin [more]
- Conditioning R/O water with sera mineral salt for angelfish [more]
- Plants do not grow but dissolve [more]
- Keeping Spinycheek Crayfish (Orconectes limosus) [more]
- Raising the pH value while lowering the hardness at the same time [more]
- pH value remains below 6.5 even after a water change [more]
- Adjust pH value for shrimps [more]
- Piranhas in an aquarium [more]
- Platies: How can I detect pregnancy, how often do the fish give birth to fry? [more]
- Male Platy is aggressive against members of its own kind [more]
- Sudden decrease of water quality and snail invasion [more]
- Position of the sera F 700 [more]
- Problematic fish stock / Can fry stay with their parents? [more]
- Problems with newly added plants/Questions about fertilizer dosage [more]
- Kribensis (Pelvicachromis pulcher) attack older juveniles when there are new eggs [more]
- Kribensis (Pelvicachromis pulcher) become pale upon transfer into a breeding tank [more]
- Kribensis (Pelvicachromis pulcher): Questions about behavior and species they can be kept together with [more]
- Kribensis (Pelvicachromis pulcher): Male is aggressive towards the female [more]
- Disinfect quarantine tanks after use? [more]
- Cleaning pH electrodes [more]
- Sand and gravel in combination? / How much sand is required? [more]
- Are clam and snail shells harmful in an aquarium? [more]
- Does a power outage cause harm? [more]
- Does a UVC clarifier harm useful bacteria? [more]
- Does sera omnipur S harm the beneficial bacteria in the filtration system? [more]
- Can I keep terrapins and fish together? [more]
- Veiltail goldfish in an aquarium [more]
- Veiltail goldfish swim upside down [more]
- Female Butterfly Cichlid attacks newly added male [more]
- Can I keep Butterfly Cichlids and Angelfish together? [more]
- Snails eat plants [more]
- Combat snails with pufferfish? [more]
- Snails multiply too quickly [more]
- Snails: How many should be added, and how to monitor and increase water hardness? [more]
- Shell dwelling cichlids have become more aggressive [more]
- Quick or slow water flow in the filter? [more]
- Black algae in a goldfish aquarium [more]
- Black fin edges after a fin rot treatment [more]
- Severe infection of goldfish [more]
- Swordtails do not multiply [more]
- Hoplosternum does not mingle with other members of its species [more]
- Can I combine sera baktopur and sera costapur? [more]
- sera baktopur: Application tips [more]
- sera baktopur: Treatment duration [more]
- Divide sera CO2 Tabs into pieces? [more]
- sera CO2 reactor: connection and installation [more]
- sera CO2 reactor: Removing other gases [more]
- sera CO2-Start suitable for 112 liters? [more]
- sera CO2-Start: Dosage of the sera CO2-Tabs plus/How does the system work? [more]
- sera costapur F: Application tips [more]
- sera ectopur: Application and tolerance [more]
- Is the sera fil 60/120 safe for juvenile shrimps? [more]
- sera florenette A on top of or in the gravel? [more]
- Do I put the sera plant color in the front or in the back position? [more]
- sera super peat (blackpeat granulate): How much and how long? [more]
- Are the sera aquarium heaters also suitable for brackish and salt water? [more]
- Are fertilizers harmful for shrimps? [more]
- Angelfish has damaged fins [more]
- Angelfish behave apathetically [more]
- Angelfish have damaged fins after transfer [more]
- Should I leave angelfish eggs with the parents, or should I raise the fry separately? [more]
- Angelfish eggs do not develop [more]
- Should I combat Trumpet snails in the aquarium? [more]
- Continuously rising nitrate and phosphate levels / Snail invasion [more]
- Gluing rocks and decoration with silicon [more]
- Does nocturnal LED lighting disturb sleeping fish? [more]
- Tiger barb overeats [more]
- Tiger barbs nibble at fins of Guppies [more]
- Peat (sera super peat) against algae? [more]
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