So quick summary I have a 300 that has been a fowlr tank for 22 years now. No issue keeping fish at all. In the past 3 weeks I have been trying to add softies. 4 small pieces actually ( leather, brown button polyps, green star polyps I think they are called for the third piece, and the fourth I think is called a colt). The problem is that LFS tells me my ALK is at 6.7 and should be a bit higher. They gave me the Red Sea Foundation kh/alkalinity part b solution. I have been adding every day for 2 weeks now per directions and absolutely no change based on the kits. I am double checking LFS results with my new Hanna Alk tester. I also did a 70 percent water change ( from the ocean not made) 3 days ago and still nothing. Temp is at 78, ph is 8.1, salinity is at 1.025 and nitrates under 12.5 consistently. Led lights are on approximately 7-10 hours depending on weekday or weekend. Suggestions? I has one LFS say the Red Sea part B product will not raise the Alk and suggested I switch to a reef builder product to raise the ALK. Thanks for any guidance and have a great weekend!