FastAquatics

Aquarium how-to guides (20)

20 step-by-step tutorials covering setup + maintenance + troubleshooting tasks every aquarist performs. Each guide carries HowTo schema for rich-result eligibility on Google.

How to acclimate new fish to your aquariumHow to add new fish to an existing tankHow to clean aquarium glass (without scratching it)How to dip coral (quarantine protocol for new pieces)How to do an aquarium water change (the right way)How to dose 2-part calcium and alkalinity in a reef tankHow to feed coralHow to fix cloudy aquarium waterHow to gravel vacuum your aquariumHow to identify aquarium fish diseaseHow to lower aquarium pH (safely)How to lower aquarium temperature in summerHow to mix saltwater for your reef tankHow to plant aquarium plantsHow to raise aquarium pH (safely)How to reduce nitrate in your aquariumHow to remove algae from your aquariumHow to set up an aquarium sumpHow to set up a quarantine tank for new fishHow to test aquarium water (parameters every aquarist must check)

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.

Related resources

Saltwater livestock · Freshwater livestock · Coral catalog · Care library · Q&A library (222) · Glossary (127) · Disease database (50) · Calculators (29) · Interactive tools (7) · Husbandry deep-dives · DIY projects · State legality directory