This does not sound unreasonable to me. My Tucker is averaging about 15g a week wight now. Siagi had a growth spurt and jumped almost 40g in 10 days. He did drop a little after he shed and poo'd but only 16g or so. Anyway, I don't think that Ekans' growth is out of line. I'd be more concerned if he were not growing steadily at this point. Maybe someone else with more BP experience will weigh in though.
Dave