Supplements

Dive Deeper: Info & Tips for Aquarium Additives

Keeping a reef tank stable requires more than just water changes — over time, corals and other inhabitants deplete essential elements that need to be replenished. That’s where additives come in. Whether you’re dosing for growth, coloration, or long-term balance, the right supplements help support healthy biological processes and consistent water chemistry.

At Top Shelf Aquatics, we offer a curated selection of reef-safe additives and supplements designed to meet the needs of both beginner and advanced reef keepers. From foundational elements like calcium and alkalinity to fine-tuned trace blends, we carry solutions trusted by hobbyists and professionals alike.

Additive Types & Uses

Understanding what each additive does — and when to use it — helps keep your reef tank balanced and thriving:

• Calcium & Alkalinity
  These are the backbone of any reef system. Corals and inverts rely on calcium to build their skeletons, while alkalinity keeps pH stable and supports overall system health. Often dosed together in a two-part solution or via calcium reactors.
  
• Magnesium
  Supports the calcium/alkalinity balance and is particularly important for the health and growth of LPS corals. It also helps prevent calcium precipitation and plays a key role in stabilizing overall water chemistry.
  
• Trace Elements
  These include elements like iodine, iron, manganese, and strontium — all used in very small amounts but vital for coral coloration, polyp extension, and enzyme activity. Available in broad-spectrum mixes or as targeted supplements.
  
• Amino Acids
  Boost coloration, improve tissue regeneration, and support overall coral vitality. Especially helpful in low-nutrient systems or for hobbyists running heavy filtration.
  
• Bacterial Supplements & Carbon Sources
  Help control nutrients by fueling beneficial bacteria. Great for nitrate and phosphate management when used correctly.
  
• Iodine
  Important for overall coral health and soft tissue development. Iodine helps boost resistance to bacterial infections and is especially beneficial for soft corals and LPS.

Optimization Tips

Dosing additives without a plan can do more harm than good — here are a few tips to help you get the most out of your supplement routine:

• Test Before You Dose
  Regular water testing is key. Before adding anything to your system, know your current levels. Overdosing elements like iodine or trace metals can stress or even harm corals.
  
• Start Small, Adjust Slowly
  If you're introducing a new additive, begin with a conservative dose and monitor coral response over several days. Many elements build up gradually, so slow changes are safer.
  
• Stick to a Schedule
  Stability is everything. Whether you're dosing manually or with a doser, consistency in timing and quantity helps prevent swings that could impact coral health.
  
• Match Additives to Coral Type
  SPS-heavy tanks may demand balanced calcium/alkalinity dosing with additional trace support, while LPS and soft coral tanks often benefit from higher magnesium and iodine levels. Tailor your approach based on what you’re keeping.
  
• Use High-Quality Brands
  Not all additives are created equal. Stick with trusted manufacturers known for purity and accuracy to avoid unexpected results.