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  1. Lighting for Refugium
  2. Bubbles in\on my sand
  3. Sand bed life
  4. sand and rock Dr. S
  5. dark spots in sandbed
  6. Mixing finer sand with a coarser grade...
  7. Algal Choice for Optimium Nutrient Absorption for HOTB Refugium?
  8. Refugium lighting: 24/7 or RDP
  9. Sandbeds can KILL????
  10. Setting up a Refugium
  11. Refugiums
  12. Sandbed Swap Article