Originally Posted by esshup
Originally Posted by anthropic
Hardness and alkalinity both in mid to upper thirties. I've dumped a lot of lime over the years, but it's a never ending battle.


Dump a BUNCH more in. I'd want to see it in the mid 40's before I'd consider putting in any fertilizer. We are a good 100 points higher than you are and do nothing to the water.


Frank, Given you have seen some very strong blooms in the past ... both planktonic and BPW ... these water quality parameter seem to be limiting factors. You may have plenty of nitrogen and phosphorus but just need to right chemistry to mobilize these nutrients.