Most the NLS I have used are solid... there was a "new" batch of NLS Thera+A I got that was more porous looking and also broke apart a lot easier than the norm.
Smell wise I only notice with the Thera+A all the rest seem to be fine.
Really? I have the opposite problem, bought a bin of Thera a a couple months ago, broke apart easy enough, porous, smelly garlic. Now a week ago I got another bin but this time it was Rock solid, smelled kind of off, fish don't like it, and was it was even half the size of the previous batch, yet the labels(down to the pellet size/ingredients etc) were identical. Kinda weird
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Hope NLS isn't developing a quality issue! I got a couple buckets I bought recently and I want to check it out, but they aren't open yet and i've still got some pellets to go through.