About a month ago I posted a question about a recent lack of frogs in an established pond after replacing the liner and lilies. Here I report about the return of frogs and speculate on possible explanations.
I finally checked my water chemistry and discovered the PH was above 8.6 (it was above the upper limit of my test kit). I drained and then refilled the pond and the PH dropped to 7.4. I don't know if that step helped the frogs but I do know that my recurring problem of string algae and cloudy water stopped immediately! Does anyone know if that was due to cause and effect or was it just a coincidence?
Over the last four months I had found a few adult-size frog dead in the pond. Also, several times I found adult-sized frogs struggling to exit the pond but they seemed to be too weak to jump out. I think they were on the verge of drowning. To exit the pond the frogs have to jump high enough to clear the rock edge which is about 5 inches high. That distance is unchanged from what it was years ago, when frog were numerous and happy. The only difference is that then the pond was covered with large, healthy lily pads whereas now there were only a few, scrawny pads. So I re-potted the lilies and they quickly responded by growing many new and larger pads. And my frog population has increased dramatically! I can identify at least three and maybe four different generations and they seem to be healthy and happy.
I believe my lack of frogs was due to a lack of lily pads they could use as a launching pad for jumping out of the water. I don't know whether correcting the water PH had anything to do with the vitality of the lilies but I do think it helped keep algae under control.
Jerry Jackson
San Antonio
I finally checked my water chemistry and discovered the PH was above 8.6 (it was above the upper limit of my test kit). I drained and then refilled the pond and the PH dropped to 7.4. I don't know if that step helped the frogs but I do know that my recurring problem of string algae and cloudy water stopped immediately! Does anyone know if that was due to cause and effect or was it just a coincidence?
Over the last four months I had found a few adult-size frog dead in the pond. Also, several times I found adult-sized frogs struggling to exit the pond but they seemed to be too weak to jump out. I think they were on the verge of drowning. To exit the pond the frogs have to jump high enough to clear the rock edge which is about 5 inches high. That distance is unchanged from what it was years ago, when frog were numerous and happy. The only difference is that then the pond was covered with large, healthy lily pads whereas now there were only a few, scrawny pads. So I re-potted the lilies and they quickly responded by growing many new and larger pads. And my frog population has increased dramatically! I can identify at least three and maybe four different generations and they seem to be healthy and happy.
I believe my lack of frogs was due to a lack of lily pads they could use as a launching pad for jumping out of the water. I don't know whether correcting the water PH had anything to do with the vitality of the lilies but I do think it helped keep algae under control.
Jerry Jackson
San Antonio