Mushroom corals (corallimorphs) are bulletproof reef inverts. Genera: Discosoma (smooth disc), Rhodactis (textured, can carpet rocks), Ricordea florida (Caribbean, jewel tones), Ricordea yuma (Pacific, larger + pricier), Actinodiscus. Difficulty: beginner - the easiest "coral." Lighting: low PAR (30-100). Flow: low. Feeding: photosynthetic + occasional pellet/mysis target feed (Ricordea + Yuma especially). Reproduction: rapid pedal lacers - drops a foot, grows into a new mushroom. A Rhodactis carpet can cover a rock in 6-12 months. Cost: common Discosoma + green stripe $5-15 frag. Ricordea florida $20-60 single polyp. Yuma + ultra Ricordea $50-300+ per polyp. WWC Bounce mushrooms $1,000-2,500+. Tankmates: avoid butterflies + large angels (eat them). Reef-safe with tangs, anthias, blennies, gobies, clownfish.
Reviewed by the Fast Aquatics husbandry team · Updated May 2026
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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.
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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