Hi ponders!

I have finally succeeded germinating lotus seeds indoors. (I used
rain water + 200 W aquarium heater (90 F) and an airstone to keep the
water moving).

However, I need to help the seedlings get strong for the next 3-4
months indoors. What fertilizers can I use? When is it appropriate to
fertlize the seedlings? What NPK formula should I use. My primary
goal is aid the growth of tubers and runners while they are indoors.
Suggestions appreciated!

Thanks
- S

PS: Zone 7b/8a (Puget Sound)