How many grows have you completed using your current method?

What week of 12/12 are you on?

What are your ppm's?

Ph of 6.8 is ideal for soil. Ideal Ph for hydro is 5.3-5.8 - They might not be swelling because the Ph is too high for your plants to use the K that they need for flowering......

Answer these questions and I can further assist you......

CGI::::::