Can I Mix SPS and LPS Corals in the Same Tank?

Yes, mixing SPS (Small Polyp Stony) and LPS (Large Polyp Stony) corals in the same tank is absolutely possible and creates stunning, diverse reef displays. However, it requires careful planning and attention to each coral type's specific needs.

Key Requirements for a Mixed Reef

1. Water Parameters

SPS corals demand more pristine water than LPS. To keep both happy:

• Alkalinity: 7.5-8.5 dKH (stable is more important than exact number)
• Calcium: 400-450 ppm
• Magnesium: 1300-1400 ppm
• Nitrates: 1-10 ppm (some is beneficial)
• Phosphates: 0.03-0.1 ppm

Use the ReefBay app to track these parameters and spot trends before problems occur.

2. Lighting Zones

• High light (top): Place Acropora, Montipora, and other SPS near the top
• Medium light (middle): Position torches, hammers, and frogspawn here
• Lower light (bottom/shaded): Keep brain corals and chalices in shadier spots

3. Flow Considerations

• SPS generally prefer higher, more chaotic flow
• LPS prefer moderate, indirect flow (too much damages tissue)
• Create flow "zones" using rock placement and powerhead positioning

4. Spacing for Coral Warfare

LPS corals (especially torch corals and hammers) have sweeper tentacles that can sting and damage nearby corals. Keep 6+ inches between aggressive LPS and any SPS colonies.

Common Mistakes to Avoid

• Placing SPS too close to euphyllia sweeper tentacles
• Inconsistent dosing leading to parameter swings
• Overstocking before the tank matures
• Skipping quarantine (diseases spread fast in mixed reefs)

Start Slow

Begin with hardier LPS like hammers and candy canes, then add SPS once your parameters are rock-stable for 3+ months. A mixed reef takes patience but rewards you with incredible diversity.

Browse corals for your mixed reef on the marketplace.