I have a 120 with a wet dry that was previously used on a 210 with bio balls in it for media. i was using the table shrimp method to cycle and that seemed like it was not working seems how my nitrates never went up. however after three weeks of that i bought some bio-zyme that said i just add one dose every day for 7 days. my dog ate it so i addes for 4 days. the ph is a little low but i am getting alot of algae growth and the nitrates are still not measureable. is it safe to add fish? also i am in the process of making the artificial live rock from concrete that i found a post about on the forums. can i add that after i already have some fish? i also have about 3in of sand that i just added 5 days ago.