I have a few questions that I can't find answers for by searching the forum. I think the info must be on here somewhere, I just can't find it. First, I know that you can use mopani wood in aquariums, but I read that you cannot use mopani that has been "prepared for reptile use." What's the difference? The mopani wood I've seen for sale for aquariums looks identical to the wood they sell for terrariums. How can you tell them apart, and why should you?
Second question: I have a new Ehiem 2217 filter that I am going to be setting up this weekend. I'm experimenting with DIY CO2, using two bottles with a wooden airstone for a 30 gallon tank. My pH has definitely dropped, but not enough. I've read that you can set up the CO2 to somehow connect to your canister filter to make it more efficient, but I can't find simple clear instructions for a complete newbie (I've never used a canister filter at all). And, just in case it's relevant, I'm testing my water with an API test kit (the drops, not the strips) and I have a drop checker on it's way from Hong Kong. Oh, and I really cannot begin to afford a pressurized CO2 setup, not after buying new lights and a new filter. I've got to work with the DIY set up for now.