Ok thanks. I wasn't intending to get Flourish Trace since you didn't recommend it in your sticky.
I might give the AP test kits a try then.
Also, I've been reading about people bufferring their water to raise their KH
level with baking soda prior or during CO2
injection? From memory, I think my tap water is around 4-5. Should I be bufferring it to reach a target range, or should I leave it as is? I think I remember reading carbonates are used by plants for photo when CO2
is absent, and it's used to avoid big pH swings, but not sure.
And also, a slightly OT but related question. I have the 20" 96W QuadTube Coralife fixture. According to one website, it says they are Power Compact bulbs. After reading the sticky, I assume I should be looking to replace them every, say, 2 years. However, the Coralife rep told me I should replace lights every 9-12 months. I guess I'm asking: are they PC
's? and should I be looking at replacing them every year or every 2nd year?