I got new plants the other day and I added them today. Before I added the plants, I had a .25 nitrite and 40ppm in nitrates. I'm curious as to why I have a nitrite rise when it has been zero. (Used tetra safe start and I skipped the nitrite phase) and my ph was 7.5. An hour after I put in plants, my ph lvl went to about 8.3-8.4....why? Is this normal? Do I fix it? This is a fishless cycle on a 20g high.