I have had some success, but am loosing some fish on a weekly basis, luckily they are cheep, but my food isn't growing like I would like. I found that my ph and alkalinity were off the chart and my nitrates were a bit high but not really unsafe. I was able to bring down the ph down along with the alkaline, but I would like it better. I have lost all the herbs after growing good, and have had good peppers but seem to be slower now. I am thinking that I need to get an air stone. What type of salt and how much. I do have some healthy fish and it seems that the smaller ones are the ones dyeing now. I had just started feeding twice daily just incase they weren't getting enough food.