Pond Evaporation Problems

As the weather continues to warm, pond water evaporation becomes a concern for pond owners.  Extreme heat can evaporate 5" to 7" of pond water a week.  As pond water levels decrease, your pond water also warms, which leads to faster evaporation - a vicious cycle! 


Warm pond water depletes oxygen from your pond. Beneficial bacteria that live in your pond and filter are dependent on the amount of oxygen in the water to thrive and do their job of converting ammonia to nitrites and nitrates by utilizing the dissolved oxygen in your pond. Therefore low oxygen levels suppress the "good" bacteria which results in a spike in phosphates and ammonia.  Excessive phosphates result in algae blooms, which is why most pond owners struggle with algae during the summer months.  Excessive ammonia is toxic to fish and can result in fish kills.  In addition, warm pond water will stress your fish and make them more susceptible to infections, ulcers, fin rot and parasites.   


As the weather warms, monitor your water levels closely.  Top off the pond water regularly and add a dechlorinator such as AquaMeds DeChlor & More (only treat for the approximate gallons of water added, not the entire pond volume).  If you have a skimmer box, you can add a simple autofill kit which attaches to a garden hose or irrigation line.  We recommend the Atlantic AutoFill Kit.


To enhance oxygen levels, install a pond aerator which can run year around.  You can also add a small fountain or decorative spitter.  If you have a waterfall, keep it running 24/7 during the hottest summer days. 



It is important that you do not 
completely change the pond water! 
Doing this will result in the loss of 
all your "good" bacteria which will make
algae problems worse. Without the  
"good" bacteria in place, your pond is no   
longer a balanced ecosystem. You tend  
to see less algae in mature ponds  
because the good bacteria has been
allowed to grow and multiply for years.