25 or 30 pound barbell works for me
Yep, same. Recently lost the 20 lb flayed mushroom anchor. Didn't hold for shit. Switched to the 30 lb spiked cylinder, its worth the extra $$$, holds much better in spots.14 foot raft, been using a spiked cylinder for drift boats, works pretty well, very occasionally gets caught...also have the pyramid, but feel the cylinder works better, Ark, CO, etc...whatever you use make sure you have a double pulley system for a 2:1 pull ratio and use a rope that is easy on your hands.
Also I poke holes in the bottom of the can and run rebar through it in a cross section to create some spikes. That is also what I use to connect a piece of chain for connection. make sure you file down the rebar though so that you don't have sharp edges.My grampa taught me to fill a big coffee can with cement and stick an eyebolt down in it.