i tryed to bury em in the hydron the last time you told me(different post) but i got these plastic drip tubes and there about as flexable as a brick, and i cant get em to stay under, but i dont really see them splashing at all, but ill grab some of em drip stakes(no hydro store around so i gottta order everything online) with the super thrive u only use 1 drop per gallon? so 1/2 ml for 20gals?