Hello everybody. Just want to put in my 2cents worth on these systems.I agree with Cecil on the bottom diffuser type.They run longer cost less and do a better job.They are better to put in a new pond that is clean to help keep it that way and they're good in an older pond to help decompose the debris that is already there by keeping o2 in the bottom layers. The fish grow faster stay healthier.One thing to consider about putting the bottom system in is the start up if you run it 24hrs right off the get go you will probably end up with an algae bloom that is caused by stirring the nutrients up and sending them toward the shore line.You might want to use a water quality enhancer to try to get rid of and start the decomposing of any debris that is going to cause a problem.The surface type is good if you got plenty of water supply for your lake but the increase in evaporation is really apparent in the hot summer months. DOC
