Mine does that from time to time.
I simply fill it with tap water, add a gallon of vinegar, turn on the mixing pump and let it run for a day or two. While I've got things mixing about in there I'll toss in my siphon hoses, drip hoses and anything else that could use a good cleaning.
Then I rinse everything and they are as good as new again.
I've never worried about it. I just like it to look, feel and smell clean.
I left a few gallons of mixed saltwater in the container for about 2 weeks. It started smelling like a cat had sprayed the area. Funky stuff!
I simply fill it with tap water, add a gallon of vinegar, turn on the mixing pump and let it run for a day or two. While I've got things mixing about in there I'll toss in my siphon hoses, drip hoses and anything else that could use a good cleaning.
Then I rinse everything and they are as good as new again.
I've never worried about it. I just like it to look, feel and smell clean.
I left a few gallons of mixed saltwater in the container for about 2 weeks. It started smelling like a cat had sprayed the area. Funky stuff!