So, we started a planted tank 2 weeks ago now, first week ran without fish. My boyfriend is not new to the hobby, but I am. He's had several large tanks in the past, but we've been in a townhome for a few years and a large tank just didn't fit. The only thing we've added was the recommended amount of stress coat. We've been repeatedly losing fish with little to no indication that there's something wrong, spread out over this week. Here's our current fish: 1 Juvenile Angelfish (Lost 3) 5 Neon Tetra (Lost 2) - Less active than I imaged. Wondering if the Rainbows are scaring them. 2 Sterbai Cory Cats - These guys are doing great! Swimming around playfully constantly. 2 Dwarf Gourami (Lost 1) - Stays hidden a lot, between the driftwood and plants. 2 Turquoise Rainbowfish - Seem to be doing well. 1 Blue Ram Cichlid (Lost) I've been feeding them twice a day, alternating Tetra Tropical Flakes and Crisps. I also added 2 Pleco Wafers for the Corys, but that's been in the past two days. Temperature is at 73.9 currently, as of 6:44AM. Could it be too cold? Pretty sure we have a heater that can be added. I haven't seen anything really eat besides the Rainbowfish and Corys, which is why I got the flakes in case the crisps fell too fast for the Gourami, Tetra, and Angels. Not sure what was going on, I took a sample of water into petsmart and had them test the water. Results: Ammonia = 0 Nitrate = 10-20 Nitrite = 0 Hardness = 75 Chlorine = 0 Alkalinity = 40 pH = 6.8-7.2 The only thing I've noticed that seems odd is this cotton like algae? on a few of the plants. The majority on the Moneywort. Here's a picture as well as one of the overall tank: Any thoughts or suggestion? We just can't figure out what's going on. Thanks!