fish based ferts are great, they work brilliantly.
I dont like using fish based stuff indoors even when its stored and used properly lol.
I am absolutely one of those guys who indeed swears he can taste it in the end product. I might be a bit paranoid there, but i only ever use fish based stuff outside in ground, not in containers or indoors because of that. Every time ive used fish based stuff indoors in flower i swear there's an aftertaste of "catfish stink bait" at the exhale of every bowl's first hit. Its very mild but it remind me of those buckets of catfish dough bait you can buy a tackle shops and bass pro and stuff.
If you know what riboflavin and other b-vitamins smells like, it kinda tastes like those smell, but as an aftertaste to the exhale. Its mild and easily missed, but is one of those "once you notice you cant un notice" things for sure.
These days i dont use it at all because the racoons like digging the roots up when i use it outside

it's great stuff functionally though, it works very well.
Ie also heard it described as tasting like the plant was grown hydroponically with lake or pond water lmao. if that description rings a bell youve probably smoked indoor buds where fish was used in flower. I have suspicions thats more to do with gregarious use of kelp in flower though.
Definitely store cool. capt got that right.