Lemon Nigerian

I ordered a TDS meter back in February, and it finally arrived this week. Bad news is TDS reading in my run off came out around 1500 ppm, when I was feeding her between 700-800 ppm. Because of this, I diluted my feeding solution by half for this week. At the end of the week I was still coming out with ~1100 ppm, so there's some progress. I've tried to avoid flushing because I can only add around 2-3L to my gravity drain reservoir and my pot size is 5 gallons. If I want to do a proper flush, it'll take almost an entire day of refilling the reservoir and dumping the drain pan. No signs of pistils yet, but I should be able to see the sex sometime in this coming week!