We hired from the Bowness Marina a couple of years back, it was reasonably priced considering, and the kit was decent. It’s pretty busy right around the marina, especially if you go north past the pier and have to contend with the rowing boat hires and the steamers but as soon as you get away from that it’s much quieter. We did a longer hire than I’d usually do and I’m glad we did, let us chill out a bit, do some distance, I think the shortest hires you’d probably struggle to get anywhere more interesting There’s a LOT of marker bouys to contend with, don’t go there, no don’t go there, no don’t go there. Arguably the worst time I’ve ever had out on the water, but, still great.
Can’t speak for algae though, wasn’t any when we were there.