I do not use ro/di for water changes / top off, which is why I thought phosate. I do not over feed.
More than likely you do have a po4
issue. The alge is consuming the po4
and that is why you are not getting high readings
There is also the issue of waterflow. Cyano
esults in nutrient rich low waterflow areas. Do some watrerchanges using RO
water (siphon the cyano
out during the water change) mixed to the same SG
and temp as the tank, reduce feeding, increase skimming and increase waterflow.
And does any one know why my shrimp might have died with no warning what so ever
Could be a molt rather than a death. Shrimp will hide for a couple days after they molt, they are very vulnerable while their shell hardens.