I suspect:
Low callium;250ppm is very low IMO;growth is part of life;if they can't calclify properly they will suffer.
Low salinity; 1.023 is marginaly low; 1.022 can do damage,IMO. 1.026 works well,IME.
PO4 at .25 is high side and may be a cause for concern . I'd reduce it slowly.
Smlaler more frequent water cahnges are my preference to maintain constancy FWIW.