Signs You May Need to Lower Your Reef Tank’s Bioload

Saltwater SmartsBy Saltwater Smarts 5 years agoNo Comments

The maximum level of acceptable bioload is unique to each system based on a variety of factors

The bioload in a reef aquarium increases through both the acquisition of new specimens as well as the growth/reproduction of established livestock. So, unless fish and corals are dying in significant numbers (which they shouldn’t be unless there’s a major problem), the bioload in any reef system is usually trending upward. While it’s exciting and rewarding to see our tanks bustling with life, we all know there is a certain threshold beyond which a system contains more organisms than it can reasonably sustain in good health. Unfortunately, there’s no alarm on our tanks that sounds when we’re approaching or surpassing that threshold. There are, however, certain signs that tell us it might be time to back off the bioload by rehoming a specimen or thinning coral colonies.

Here are just a few examples:

Stubbornly high nitrate/phosphate levels

Advertisement


We can’t prevent our livestock from producing waste (not even with little corks!), and we can only limit what we feed our fish and invertebrates to a certain extent. So if your nitrate and phosphate levels remain stubbornly high despite doing everything in your power to minimize nutrient import and maximize its export (using RO/DI-purified tap water, employing a quality protein skimmer, performing copious water changes, etc.), there’s a good chance your system’s bioload is simply too high.

Stubbornly low or unstable pH

The more animals you have respiring and producing waste in your tank, the more rapidly buffering compounds in the water will be used up (in other words, the lower the alkalinity, or the water’s ability to neutralize acids) and the harder it will be to maintain an appropriately high and stable pH MORE

Categories:
  Corals, Fish, Invertebrates, Reef, Science, Tanks
Saltwater Smarts
About

 Saltwater Smarts

  (146 articles)

Saltwater Smarts is a unique online resource created by long-time aquarists Chris Aldrich and Jeff Kurtz to inspire and entertain a new generation of marine aquarium hobbyists while helping them acquire the reliable, authoritative knowledge base they need to succeed with a saltwater system. By clarifying key concepts, techniques, and terminology, as well as sharing expert insights from fellow enthusiasts and industry professionals, Chris and Jeff hope to promote a more accessible, sustainable, and enjoyable marine aquarium hobby. Read more about our mission and the contributors who are part of our team.

Leave a Reply