When my friend in Perth Australia,moved house, I went over to help with the garden. I thought I had sandy soil, but they garden on what is practically pure sand. With watering restrictions constantly in place, we decided that sea weed might help.
I bought back bagfuls of kelp from the beach, and then decided to wash it in a barrel of water to remove sand and salt, before chopping it and putting it in the compost heap, to mix with all the dry stuff. Because of the heat, stuff rots really quickly.
Unfortunately the top came off the outside tap , and metered water was gushing everywhere. I was grabbing every available container to save this expensive water from going down the drain. Eventually the stop cock was found, The water turned off, and I looked like a drowned rat. So much for saving money by making compost from free seaweed. I had to make a quick trip to bunnings (oz version of b and q) get a new tap, and fit it, with instructions over internet from OH back in England, before we could turn the water back on and have a shower.