The ones I had and the one in the shop were from the same batch . I may just try another from another shop just to prove I can . People want motoro and leo's but if I am honest I really like the rectics mostly . And the rectic motoro hybrids . I will try my best with this one with melafix but from past experience I don't hold much hope . Pointless doing a water change as amm = 0 nitrite = 0 nitrate = 10/15