I always used aldactone before the show. It reduced the water under the skin while furosemide always gave me the feeling that I colapse and dry out without any visible results cause I think it reduces the water in the organs more than aldactone.

But to look shredded your meals and water intake must fit 100 percent, if you do all right you maybe need nothing of it and dont forget, every diuretic can make you look flat and destroy your complete shape! So be careful with the dosage. Less is here definitely more.

I know many that use dandelion root with good results.
Lasix nearly killed me I got lucky
Aldactone worked well for me 1 tab in the morning for 1 or 2 mornings did the trick for me.
But I like a good ol sauna and steam or hot tub after a good workout. I may try dandelion root eventually.
Be sure to keep your sodium and potassium levels in check!