.......... and there's a lot of keepers that talk out of their arse.
There's another recent thread on the subject of growth, where I posted the following.
Sex, genetics, social hierarchy, etc, determine growth rates among clown loaches, with every group typically having those that are smaller, and/or larger than the rest of the group - even if all raised from the same size, under the same conditions, eating the same quantity of food. I have kept CL's for many years, including in species only tanks, and this appears to be quite common.