Managing pH upwards in Optimized Modular Aquaponics systems with ULTRA-OXYGEN U02 equipment
Extremely importantly, Ultra-Oxygen UO2 Micro and Ultrafine bubbles (MB/UFBs) and good, sustained oxygen levels can have a very positive impact on the behavior and effectiveness of calcium hydroxide (Ca(OH)2) and potassium hydroxide (KOH) in adjusting pH in an aquaponics system:
Ultra-Oxygen MB/UFBs and Calcium Hydroxide (Ca(OH)2):
Ultrafine bubbles are tiny bubbles with diameters in the micron range. When these bubbles are introduced into the water, they can remain suspended for extended periods due to their small size and buoyancy.
In all our Aquaponics systems, we advise the use of Hydroxides for managing pH upwards into an acceptable range of between 6,2 and 6,8 because these Basic compounds are very predictable in their behaviour and do not inherently contribute to the Buffering Capacity of water. But it has to be remembered that these compounds are extremely Basic and in any concentration, they will alter the pH drastically and shock or kill the beneficial microbiology in the system. So we need to be intentionally gradual in dealing with low pH (and we do not ever manage pH downward, except by facilitating and enabling Nitrification).
Practical Aquaponics South Africa have partnered with www.ultra-oxygen.com and use their registered patent to manage pH in conjunction with Ultra Fine and Micro bubble injection in Aquaponics because this is a game changer at almost any level, but most especially at commercial levels.
In the case of calcium hydroxide, the presence of UFBs enhances the dissolution and dispersion of the compound in the water. The increased surface area of the bubbles can facilitate the contact between the Ca(OH)2 particles and the water, leading to faster dissolution so smaller amounts are used more effectively.
Improved dissolution and controlled injection of calcium (and potassium) hydroxides in combination with Ultra Fine bubbles result in a more controlled increase in the concentration of hydroxide ions in the water, which would couple and bind with the free Hydronium or radical Hydrogen in the system which naturally results from effective Nitrification, leading to a better pH adjustment without spikes in pH (also referred to as catastrophic events that SHOCK the microbiology).
Ultra-Oxygen MB/UFBs and Potassium Hydroxide (KOH):
Similar to calcium hydroxide, the presence of UFBs can enhance the dissolution and dispersion of potassium hydroxide in water.
The increased surface area provided by UFBs allows for better contact between the KOH particles and water, leading to faster dissolution and release of potassium ions and hydroxide ions.
This can result in a more efficient pH adjustment when using potassium hydroxide in an aquaponics system.
Good Oxygen Levels:
Adequate oxygen levels in an aquaponics system are crucial for the well-being of microbes, fish and plants.
Good oxygenation promotes the growth and activity of beneficial bacteria, which play a vital role in the nitrogen cycle of aquaponics systems.
Higher oxygen levels support the respiration of fish and root health in plants (Rhizophagy Cycle).
When it comes to the behavior of Ca(OH)2 and KOH, good oxygen levels can help maintain the stability and efficacy of these compounds by preventing the formation of insoluble precipitates or undesirable chemical reactions that may occur under low-oxygen conditions.
The presence of micro and ultrafine bubbles can enhance the dissolution and dispersion of both calcium hydroxide and potassium hydroxide in water, leading to faster pH adjustment. Additionally, maintaining good oxygen levels in the aquaponics system supports overall system health and stability, ensuring the effective behavior of Ca(OH)2 and KOH without undesirable side effects.
t’s worth noting that while micro and ultrafine bubbles and good oxygen levels can enhance the effectiveness of pH-adjusting compounds, it is still important to monitor and adjust the pH carefully and that the Ultra-Oxygen MB/UFB generators avoid sudden or drastic changes that could stress the organisms in the aquaponics system.
The use of UO2-PHMC-02 pH Management Control System measure the pH and release calcium hydroxide (Ca(OH)2) and potassium hydroxide (KOH) alternatively into the aquaponic system as and when required, this simultaneous with micro and ultrafine bubbles that optimize testing, observation, and adjustments for the fish and plants that is essential for maintaining optimal conditions in your aquaponics system.
Further to the above it is worth noting that alternating between different pH-adjusting solutions, such as calcium hydroxide (Ca(OH)2) and potassium hydroxide (KOH), can be done automatically now and is it very beneficial for your aquaponics for a few reasons:
pH Range: Different fish and plant species have different pH preferences. By alternating between different solutions, you can cover a broader pH range and cater to the specific needs of various organisms in your aquaponics system. Some species may prefer a slightly acidic pH, while others may thrive in a more alkaline environment. Alternating between solutions allows you to fine-tune and maintain the pH within a suitable range for different organisms.
Nutrient Balance: Aquaponics systems rely on a delicate balance of nutrients and chemical processes. Using only one type of pH-adjusting solution consistently may introduce an excess of certain nutrients into the system. For example, using calcium hydroxide exclusively could result in an accumulation of calcium ions in the water, potentially affecting the nutrient balance and overall health of the system. Alternating between different solutions helps maintain a more balanced nutrient profile.
Chemical Interactions: Different pH-adjusting solutions can interact with other chemical components present in the water differently. By alternating between solutions, you can minimize the potential negative interactions and maintain stability within the system. For instance, if you solely use potassium hydroxide for an extended period, it may affect the availability of other essential elements in the water. Alternating between different solutions can help mitigate such interactions.
Avoiding Overdependence: Relying solely on one type of pH-adjusting solution can lead to overdependence on a particular chemical compound and even nutrient toxicity. Over time, this can lead to potential imbalances or unintended consequences. Alternating between solutions allows for a more diverse and adaptable approach to pH adjustment, reducing the risk of overreliance on a single compound.
It’s important to note that the specific pH requirements of your aquaponics system will depend on the species of fish and plants you are cultivating. Regular monitoring of pH levels, observing the health and growth of your organisms, can be done less tediously.
We are also offer automation the dosing of pH using the technology mentioned above, and are pleased with the results. As always, we are committed to not over-engineering our Aquaponics systems, and ensuring that they operate at a reasonable level of success without the need for mechanical interventions, but we are extremely pleased with the way that this approach enables us to manage BOTH O2and pH in a very effective way in upgraded commercial systems.
Contact Heindré on WhatsApp +27 60 70 33 865