I remember when I had to use it.Just run a good fresh water flush if ya want to kill the salty taste.I've done all the way up to week 4 of flower with MG and finished off with good nutes and supplement's before too.
good for small seedlings i hate to say it but its true. ive had faster growth with 3 week olds in that stuff than happy frog. but as time goes on when you up pot and repot it will need to be in happy frog or fox farm.