We develop for the fungal and bacterial research community and we are launching a benchtop counter (µCount 3D) based on a volume scan to count both fungal spores and bacteria. Resolution (1,3µm) is optimized for fungal spores and we also count small species like spores of Beauveria and Candida and supply images of findings. Counter is not expensive and would certainly help you to easily adjust your concentration to where you want. Alternative, is the the counting chamber which most groups use.