id recommend a 55g tank. i also had the same problem you are having,
and there is nothing better/cheaper than going to home depot and getting
2 shop lights for liek 8.50 a piece to house a total of 4-4 foot
flourescent tubes. 55g tank = 4 foot long. for a 29G you can try
getting a glass top maybe and then two of the hood lights you currently
have?