Your plants look pretty good to me. PLEASE... don't start pouring fertilizers,
Cal-Mag, and every other potion known to man, until you get more familiar with growing. Small containers will drive you crazy trying to get the water right as they are either soaked or dry. Get them into larger containers and it will help to keep the moisture constant. I use
Promix, which drains very well. If you are going to need to re-pot these, why not add a little more Perlite to make it drain better?
Your plants look pretty good to me. It's very easy to tend to over-mother the plants when you are a newer grower. Keep the soil damp, not wet, and go easy on the nutrients, especially when it is smaller. Many people assume that plants are like people, and if you overfeed them they will become fat and sassy. Tis is the opposite of what happens and plants tend to grow best when left to themselves. Your plants look good but are still small and the amount of fertilizer that they need is minute. Keep strong light on them, keep them damp once the roots have grown in, and go easy on the nutrients and you will avoid most of the pitfalls that many new growers make.