When I bought the plants, the guy at the lfs sold me plant lighting specifically for the plants. I am going to rehome the pleco. How should I go about the gravel/ plant situation? I have a whole lot of gravel right now. I don't want to traumatize the fish. If I lower the oxygen content wont I harm the fish?
I'm sorry, but if he sold you a pleco to put in a 35g, I wouldn't trust his advice on plants. I've had people tell me all sorts of garbage... just because they think they are experts doesn't mean they are.
I will PM you a link to a great plant website where you can look up the plants you have and find out their specific requirements.
When I switched out the gravel, I put the fish and plants in a small tank with a sponge filter. (I also put most of the tank water in the tank with them, so it kept their water parameters pretty much the same.) While they were in the small tank, I took out 3/4 of the gravel from the main tank, and replaced it with flourite. Pleeeease, make sure to rinse the flourite 5 million times in dechlorinated water before you add it to the tank. Otherwise, it will cloud up the tank and you won't be able to see anything. I recommend washing the it the day before you add it... that way the fish aren't waiting too long to be put back into the tank. (Also, make sure that the filter media stays wet during the whole process.) A little clouding is okay, and it won't harm your fish a bit. After you finish re-planting the tank, you can add the fish along with their original water.
A lower oxygen content won't harm the fish if your plants are healthy and have enough light and good fertilized gravel to root in. They produce a lot of oxygen (when healthy), so they make air pumps unecessary!
Hope that helps! Feel free to PM me if you have any questions.
