Always wondered about that concentration, but you and someone else here seem to have no pip worth mentioning. Had him on my to-do list as my EPL 250 supply dwindled down, but then Ourosoros and his 250 showed up, more peace of mind for a pip pussy like myself. Might be avoiding a good thing, might try it sometime, but 250 is what I usually see available. When I first showed up here what EPL offered was 300, dropped it to 250 soon after with no explanation. I had both, no pip either way, maybe TU's upwards of 250 are practical after all.