Hi everyone. My name is Angelica. I just started getting back into my hobby of fish keeping. I have a 90Gallon Wave Aquarium. And a couple of fish. But my problem is why are my fishes dying? I had 2 anglefish, one bala shark and tiger striped fish, and they passed away. I only have left 2 blue Gourami and one look like he’s about to go... and one tiger left. And the 2 algae eaters. What am I doing wrong? I have the strips to check the water. I took a sample to Petco. They said my ph was low. So they suggested I buy this product. Go up the pH. Now my fish are just swimming at the top near the filter. And the blue stays in the bottom corner and only goes up for an air bubble and swims crazy back down. ... please help me I won’t give up on them. I even went to buy an air pump tonight... help me please. Thanks. And thanks for accepting me into this group!