Hi Chelle, I do lose 'some' nutrients. I just read somewhere, they gave a percentage off loss. I don't actually remeber what they said.....'maybe' 40 % loss. I don't really see it as a 'loss'....I use what I collect on my citrus , blueberries and what veggies I'm growing in dirt.
The density of fish, is a key factor too....if your 'pushing the limit'....it may be good to lose some anyway. The filter doesn't do 100 % of the solids....most of the big stuff anyway.
I also have a bio-filter(s) to help change the nitrates to nitrites...( or is it the other way around ?)
As long as your algae isn't the 'string' type....I don't think it would be an issue. Of course the size of pipe will be a big factor.