I've read all about, got my first shrimp and tried it out.
Boiled the kettle, chopped up a small piece of of zuchinni and three it in for 1 minute. I let it cool and it wouldn't sink.
Did it again for 5 minutes, still wouldn't sink.
Tried a small piece of spinach, nothing.
The Fraternity of Dirt
If at first you don't succeed,,, keep kicking it RubberSideDownOnTheLanding, 2-75g planted, 5-55g planted, 5-20g planted, 110g w/30g sump, 8-10g, Refugium, doghouse/newbie 2012 update adding table top pleco pans & a 90g (Nutz)
Fork is iron made and is not good for shrimps. You can stick zucchini to the substrate with plastic straw. To prevent veggie to move up just tide one zip tie 2" from the bottom. There are cocktail "swords" which you can use too.
If you like to give good veggie to the shrimps use kale, spinach, dandelion and nettle.
Zucchini just test well for them but it didn't deliver almost anything.