Unless you washed the plants completely under water with some crazy soap, you probably have mites still. If no adults or webs are present eggs still will be, give her a thorough look for early signs of new mite damage is what id do. Checking the under sides of leaves.
I work in a nursery near Seattle its kinda customer to customer. Its funny when guys come in and say their tomato plants have spider mites under 3k of hps lights. And i always reply, oh man!
Plusthe straw is organic, and as living organic things breakdown to compost they utilize a lot of soil nitrogen to do so,. I mulched already this year with a very rich compost, which consisted of chicken manure worm castings, bone meal, lime etc.
Ok,cool. What fish , tank size? In smaller tanks it's harder to feed in preferred concentrations and also not hurt the fish. I've added things like kelp, and other sea weeds. If the plants look healthy they will flower just fine for ya. Things to watch out for are solid waste accumulation, and...