I am planing on making an 8 foot pond outside. it will be dug into the ground and will probably be sealed with cement. i have a couple of problems and questions.
8' long 30" wide 12" deep. should it be deeper? i would prefer to make it as shallow as possible.
i think i will seal it with cement but i have heard that it lowers the Ph and hardens the water so, to combat it i would put copious amounts of leaves and driftwood, is this enough.
filtration would probably be an internal filter and a fountain to break up surface tension.
for sure there will be an oscar and an 8 inch turtle, but i want a lima shovelnose, acarichthys heckelli, geophagus, uara and a pike cichlid hopefully comprisceps which one would work best?