We have a pond full of Catfish with heavy clay soil. After the big winter rains in California it was looking very turbid. In the past we have had great success adding Liquid Alum to clear things up. This time unlike many treatments before our Ph dropped like a rock to around 6. We know that is a common result with non buffered Alum, but this one caught us by surprise. Killed some fingerling size and shocked the bigger ones so much, it took them a week or more to start eating again. 6 weeks later Ph still low 6.4ish, after reading about our options we bought Sodium Bicarbonate dry to try and bring it up to more normal levels. Has anyone used this to raise ph? If so, did you apply it dry or make a slurry( we have a jon boat with a tank sprayer)? Is there a general rule for how much to add water volume to product? Thanks!
