Thumbs up to the plant-based coagulants! I’ve also given moringa seeds a try and was pleasantly surprised by their effectiveness. In line with AquaFern1028's point, it's all about moderation to avoid the bitter aftertaste.
And on the topic of plant-based methods, any survivalists here delved into the wonders of the sycamore tree? The inner bark can be used as roughage to filter water, the leaves are great for brewing a soothing tea, and the seeds, when roasted, are an excellent coffee substitute. Good for several purposes if you ask me.
As for gravity-fed charcoal and sand filters, they have their merits too. It’s a neat technique, especially when in a pinch, but it can be a bit labor-intensive to set up. Has anyone come across a 'shortcut' process for this? Some kind of hack to speed things up? Just curious.