over the past three years I have had many problems of trying to clean my pond out, because the pond man that built it, barried the pumps under the rocks. Less to see I understand, impossible to get to to clean is what they are = (. anyhow I am looking to fix this, I have pictures here on this site of my pond. I am hoping to get some help with this from here. I am looking to fill in between all rocks and boulders with cement/mortar not sure which would be better add the coloring when mixing to match the vegas theme. I then plan to cement the bottom as well with river rock on the bottom so to help the concrete and make it easier to clean with a brush. anyhow if i do this how long will I have to wait to put my fish back in, because as of now I dont have anywhere to put them except in a plastic container. Also the pond guy recommended that I use a 3/4 to 1hp hayward powerflo matrix pump instead of using submersible ones. The reason he says to use this is because they hold up to the heat here in vegas, and they cost around 175.00. So in doing research the amps are about equal to a savio master solids sub pump, has anyone else used these? If so what was you outcome?