Morning all,
Hope everyone had a good weekend and if you are off, enjoying Presidents Day. Here is my question. My new tank is now beginning into week 5 of the cycle. Nitrites are still peaked at 5ppm, however the Nitrates are continuing their climb currently 10 moving up slowly-yeah!! I put new plants in on the 15th (Anacharis and Hygrophila-corymbosa) The Anacharis looks fine, however the Hygrophila looks a little weepy and some of the leaves are falling off. This may be normal, since they were just put in the aquarium. I was wondering about the temperature. I've gone on line looking and it says they do ok in 68-82 degrees water. This aquarium has never gotten above 70 and normally stays at 68 degrees. I think this my cause a problem, as the smaller tank my fish are in right now is normally between 74-76. It's in a smaller, warmer room in the house. Would you recommend I get a heater not only for the fish, but plants as well and I currently have a 20 watt. light and was reading that the Hygrophilia likes moderate to bright light. I can go up to a 40 wt. but no higher. Would you buy a light as well or try the heater first for the plants and if so, could I get recommendations please. I have a 29 gallon tank. Thanks so much in advance for your help.

I'd get a heater My tank stays at 72 degrees or so on its own thanks to the light and stuff, and I find that to be a pretty ideal temperature for everything living in water
Make sure you choose a heater where you can adjust the temperature so that it won't make the water too warm