Well, not sure about the cleaner you had for a year...I have heard they need some Iodine supplements to stay alive or molt properly and others have told me they don't live that long without enough fish to feed it parasites. Camels eat anything AFAIK
, so that may be why he is fine. This is a possible theory, these kind of things are nearly impossible to prove - assuming all water parameters good, no toxins or high doc
Also are you using a swing arm hydrometer? They (and tubes) tend to read low .004-.005, meaning if you measure 1.026 the actual sg
measured with a refractometer may be 1.031...kind of high. Now many lfs
around 1.017 to 1.022 to save on salt $$. This is a very big change and could account for the loss of the new cleaner, just a theory. These guys are very sensitive to rapid changes in water parameters.