You didn't come across wrong....just wanted to give you options!
There is ALOT of Science on this....believe or don't, there's plenty of Research...we found it all to be true at our lake!
Plastic is close to the same density as water, some plastic is less than 1 (Water, there are equations, etc) and floats, some is just a little over 1 and sinks. Most Plastic is so close to the density of water. Fish show up because of the air bladder...other things show up because the density difference is high.
Plastic can absorb or reflect sonar and radar. Roundness also helps to decrease signature.
Plastic with holes can allow sonar and radar to pass or decrease signature.
Instead of wood that I have in the one bucket, just use PVC. Sand the heck out of it with 60 grit sandpaper and algae will stick better and build a solid colony.
The crates look like a rock on the best equipment we have here at our lake....the PVC Trees can't be found in most places. :):):)
DYK....there are several types of wood that are denser than water and sink!