Aquarium Guides Setup, Maintenance & Troubleshooting

A fishless cycle typically takes 4-8 weeks. You'll need to dose ammonia daily and test water parameters until both ammonia and nitrite consistently read 0 ppm within 24 hours of dosing. See our freshwater cycling guide for step-by-step instructions.

A 20-gallon tank is ideal for most beginners. It's large enough for stable water parameters and a good variety of fish, but small enough to be manageable. Avoid anything under 10 gallons — smaller tanks are actually harder to maintain. Our fish tank size guide breaks down the options.

Perform 15-20% water changes weekly and gravel vacuum every 1-2 weeks. Clean filter media monthly in old tank water (never tap water). Glass cleaning can be done as needed. Heavily stocked tanks may need more frequent changes. See our complete cleaning guide.

White/gray cloudiness usually means a bacterial bloom — common in new or recently cleaned tanks. Green cloudiness is an algae bloom caused by excess light or nutrients. Both resolve with patience, water changes, and addressing root causes. Our cloudy water guide covers every scenario.

Yes — saltwater tanks require more equipment (protein skimmer, powerheads, salt mix), tighter parameter control, and higher costs. But they're not impossible for beginners who do their research. Start with a FOWLR (fish-only with live rock) setup rather than jumping straight to coral.

If you're keeping tropical fish (bettas, tetras, angelfish, etc.), yes — they need water between 72-82°F. Goldfish and white cloud mountain minnows can go without one in room-temperature homes, but a heater prevents dangerous temperature swings overnight or during seasonal changes.