I have two African clawed frogs, Frodo and Leena. Frodo is 8 now, and Leena is about 5 and 1/2. I got them when I was 11 from the Grow-A-Frog company, so I had no idea what I was doing, and I had no idea that the two gallon tank I bought from Grow-A-Frog was completely inadequate for this kind of frog. About two months ago, I moved Frodo to a five gallon aquarium but kept Leena in the two gallon Grow-A-Frog tank (I know that five gallons is still inadequate, but I should have 20 or 29 gallon in the next week or two). I tried putting them together once a long time ago, and they started attacking each other and became really stressed, so I kept them apart... Well, a few days ago, I decided to try putting them together again. For the first night, they were amplexing quite a bit and were extremely active (Frodo's the male and Leena's the female, but Frodo is actually a bit bigger than Leena, so I don't know if that's good that they were amplexing or not?). The second day, they also seemed fine... But on the third day, I noticed Frodo had become a lot lighter in color. Today, four days after putting them together, Frodo is really light (he's a normal ACF, but he's starting to look like an albino). I've read this could be a symptom of a heart attack, but other than that, I haven't found this symptom attributed to any other disease. Some more details: the substrate I have in the aquarium is just fine, blue sand; I don't have a thermometer on the aquarium, but my house is always anywhere from 65 to 80 degrees; I just feed them food pellets that I bought from Grow-A-Frog. Leena hasn't changed color at all, and although Frodo has, he still attacks the food - he does seem a little less active than he has been the past couple days. Please forgive my ignorance - I'm trying to learn more about these frogs and I feel really bad that I've kept them in such bad conditions all these years If anyone could help me out with the answer to what might be causing Frodo's sudden loss of color or give me some advice on what I should be doing differently, I would really appreciate it. Frodo was my first pet, and I really wanna give him a happier, healthier life.