Alk can be higher even though calcium is to, my calcium is 500right now and alk is at 10.2.Also you can run rowa with bio pellets a guy I work with has done it for almost a year now with great results,I didn't think it would be good to run phosphate media with bio pellets either but I guess ya can lol.You just need to remember to feed the tank wellI didn't read through entire thread but with your ca being 500 you may have trouble keeping alk up. R u sure it is 8.6? What kit? Sorry if I missed it? My api was reading 10-11 when I got Hanna it was 6-7.
As far as rowa and bio pellets. Dr Tim told me you're not supposed to run both together as the bio pellets do both anyway. Something to do with the bacteria actually needing phosphates.
Hope this helps and good luck.


