Gold1answered grow question a year ago I'm no expert so definitely get some second opinions.
Depends on your medium. Looking at your diary, I am assuming you are using soil.
You should be watering when the plant needs water. I like to let my soil dry out to maybe 30% moisture content, then water. I can tell the plant needs watering by three indicators.
1. The finger method: Stick your finger in the soil. If you notice that the top two inches are dry, you likely need to water.
2. The pot method: Pick up the pot with your hands and gauge how heavy it is. If it is very light, you likely need to water.
3. The sight method: Plants that need water will have droopy stems and leaves. Plants that have too much water will also exhibit these symptoms with the key difference being the suppleness of the leaves. If the leaves feel dried out, you need water.
If you follow all three indicators, you will never have a problem with watering.
I would recommend against flushing so often. You run the risk of overwatering your plant as well as leeching nutrients out of your soil. Instead of flushing so often, you can water/feed until you get about 20-30% runoff. This will help avoid salt buildup in your medium while also not leeching nutrients too fast. If you notice signs of nutrient lockout, go ahead and flush but don't overdo it.
Yellow leaves developing on the bottom of your plant is an indicator of nitrogen toxicity, or more likely in your case overwatering.
Other than that, you are looking good. Hope this helps 👍