Aquarium glossary

Plakat

Short-finned betta
DefinitionPlakat is the short-finned, traditional form of Betta splendens - more athletic, longer-lived, and the original "fighter" body type before fancy long-finned varieties were bred.

In depth

Plakat bettas are the original wild-type body form of Betta splendens. Distinction: short fins (< 1 inch fin trail), athletic body, faster swimmer than longfin halfmoons. Lifespan: typically 5-7 years vs 3-5 for longfins (less stress on swim bladder, less fin damage). Color types: traditional plakat (red/blue body), copper plakat, koi plakat, marble plakat, dragonscale plakat. Why hobbyists prefer: better at swimming in moderate flow, less likely to tear fins on decor, longer lifespan, breed-quality genetics. Tank min: 5 gallons (same as longfin). Tankmates: generally more tolerant than fancy longfins because their fins aren't a target. Avoid confusing with: wild bettas (B. imbellis, B. mahachaiensis) which are different species.

Reviewed by the Fast Aquatics husbandry team · Updated May 2026

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Aquarium-keeping fundamentals

Whatever specific topic brought you here, four fundamentals govern long-term aquarium success: water quality, parameter stability, biological filtration, and species-appropriate husbandry. Skip any one and the others struggle to compensate.

Water quality: ammonia + nitrite at zero, nitrate under 30 ppm freshwater + 10 ppm reef. Test weekly with API or Salifert kits. Use our water parameter checker to score your readings against your tank type.

Parameter stability: stable wrong parameters beat fluctuating ideal parameters. Most fish tolerate a wide pH range if it's stable. Sudden swings of 0.4+ pH or 5+°F kill fish faster than chronic suboptimal values. Use temperature controllers (Inkbird) + automated dosing for consistency.

Biological filtration: the bacterial colony on your filter media + rock + substrate is the engine. Never replace all media at once. Use our filter turnover calculator to size correctly.

Species-appropriate husbandry: research adult size, territoriality, diet, and tankmate compatibility before purchase. Use our tank stocking calculator + compatibility guides.

Frequently asked questions

How long does an aquarium take to set up? 4-6 weeks for full cycling + first stocking. Use our cycle ETA calculator + how long does cycling take.

What's the best aquarium for beginners? 20-gallon long. Big enough for parameter stability, small enough for budget + space. See beginner picks.

How often should I do water changes? 25-30% weekly. See water change frequency Q&A + water change calculator.

Why does my fish keep dying? 5 leading causes: uncycled tank, wrong species pairings, no quarantine, undersized tank, neglected water-change schedule. See full diagnosis.

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