Another fert option: Aquarium Co-Op’s Easy Green. It’s fairly comprehensive, and is all I now use. I use it on several 4g tanks, roughly half a squirt after wc, each week.
As said above, DBT are not easy plants. I’d second the recommendations for alternatives.
Also, plants must adjust to their environment, which means likely initial yellowing or melt. Look for new growth, and ignore whatever was original. If the new stuff is yellowing, then perhaps dig in more to specific deficiencies.
If you enjoy the measuring, testing, tweaking, etc., dry ferts can be quite satisfying perhaps. I find a squirt from a single bottle to be more my style.
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I can only grow plants when they're completely under water. Everything else is doomed.