Fishkeeping seems easy, but it is a nightmare for countless beginners.
Fish you just put into the new tank will belly up within 7 days.
Well-cared fish suddenly sink, have rotten tails or die one after another.
The more you change the water, the murkier it gets. Fish die right after you replace filter media.
Most failures are not caused by bad luck. 90% of new hobbyists fail because of basic misunderstandings. Follow these 7 rules, and even total newbies can raise fish successfully for three years.
Rule 1: Prioritize hardiness over appearance. Stick to tough fish for beginners.
Many new hobbyists get attracted by colorful, weird-looking fish without checking their care difficulty, and the fish die the next day.
Do not just follow popular fish kept by senior fish keepers.
The first step is choosing the right fish instead of pretty ones. Recommended breeds: guppies, zebrafish, goldfish and small predatory fish. They adapt well and tolerate unstable water quality.
Avoid discus fish, wild angelfish, marine fish and plecos. These luxury fish require strict temperature, water parameters and feeding schedules. You cannot keep them alive without half a year of experience.
Check fish health before buying. Pick active fish with fully extended fins, no white spots and no sinking behavior. Never buy sick fish no matter how cheap they are.
Rule 2: Cycle your tank first; never add fish to a brand-new tank immediately.
Cycling is the core of fish raising.
Many beginners fill the tank with water and add fish right after installing filters, which is a fatal mistake.
Correct operation: Turn on filter and oxygen equipment, let the water circulate for one week, then add a small number of fish gradually.
Do not feed or change water during the cycling period. Let nitrifying bacteria colonize the filter media to build a stable nitrogen cycle. This step cannot be skipped.
Rule 3: Feed less rather than more. Overfeeding kills fish faster than hunger.
Fish will not starve to death, but they easily die from overeating. Feed 1%-2% of the fish’s body weight each time. Make sure all food is consumed within 3 to 5 minutes. Small frequent meals work best.
Rule 4: Change water according to water condition, not rigid schedules.
Do not copy online guides and change water every 3 or 7 days mechanically. Improper water changes trigger diseases.
Follow the principle: small volume, frequent frequency. Adjust according to water clarity instead of fixed dates.
Rule 5: Do not skimp on key aquarium equipment.
You do not need the most expensive gears, but core devices cannot be cheap low-quality goods.
The filtration system is the kidney of your tank. Never buy cheap 99-yuan all-in-one tank sets with poor pumps, heating rods and filter materials. They break down quickly and cause heavy losses.
Rule 6: Match fish by temperament instead of appearance to prevent predation.
New keepers love mixing all their favorite fish together for better viewing. As a result, small gentle fish get wounded or eaten by aggressive species.
Mix calm fish with calm fish, and fierce fish with fierce fish. Avoid big size gaps and make sure they share the same water quality requirements.
Rule 7: Avoid unnecessary disturbance. Stress is more harmful than disease.
Fish are extremely sensitive to frequent moving, light switching, net catching and large-scale water changes. Stress sharply lowers immunity and leads to various illnesses.
Place the tank in a quiet shaded area away from doors, speakers and direct sunlight. When fish show minor discomfort, turn off lights, stop feeding and leave them alone for 2 to 3 days. Do not add medicine blindly; most fish recover with quiet rest.
Fishkeeping is simple: stabilize water quality, control feeding and stop over-disturbing your fish. Keep these 7 rules in mind, and you will no longer suffer frequent fish deaths or tank collapse. Enjoy a lively aquarium for years.
