1) Salinity is 1.01 by hydrometer. I've used Red Sea salt when this happened with puffers and now I'm switching to Sera because the lack of other salt brands.
2) 200l, 2 GSP's and 1 F8
3) Feeding 1 time per two days with mussels, prawn and krill. Water change was 20% once per week but when the problem appeared I switched to two 20% per week. No products other than salt were used in tank.
4) No changes
5) Only Juwel Bioflow 3.0 internal filter. Waiting for red mangrove germs to arrive to make a phytofilter like in my fw tank.
