Thanks for you responses Mikaila31 and Byron. I will attempt to answer both of your queries and also update the situation.
I am currently using the Marineland 24-Inch to 36-Inch Aquatic Plant
LED Light with Timer (reference
). For more than a year I used the Marineland Reef Capable
LED Aquarium Lighting System (reference
- You can also view my tank here under the product review by M.Ross) - The plant version was not available at the time. When it did become available, I wasn't ready to part with the extra money and was content on replacing plants, which don't react favorably to 10k reef lamps.
I was using Seachem Flourish Excel, 10ml/40g, once per week in an effort to boost plant growth. I will discontinue based on your recommendation.
New fish (neons and Otocinclus) had been added two days prior to a partial five gallon water change. I used DI water (pH ~7.5) from the local Marine shop, that I have done business with in the past. I also changed out the Nitrate filters and Poly-Filter, used in the prestage filtration. I added the proper dosage of Seachem Discus buffer and Neutral regulator to the tank. It was that evening that I notice a couple of neons dying - they were randomly swimming within the current without any strength - they were easily captured.
Yesterday, I did an emergency 15g water change - Only this time I used my own house water (soft pH ~9), and treated each 5g with the proper doses of Seachem Prime, Seachem Discus Buffer and Neutral Regulator, and API Leaf Zone and Amazon Extract. I removed the Poly-filter and Nitrate filter from the prestage filter. I have retained the aerator in the prestage filter that runs at night when the lighting is off. So far, so good. I have not lost anything further. I still have three Bolivian Cichlids, several Otocinclus cats, and four neons. They ate well this morning.
One other product I have had bad experience with that causes fish-kill is Tetra's EasyBalance Plus - One can observe the "suffocation" - Immediate supplemental aeration and water change is required unless your willing to part with your fish - But you may already be aware of this product.
Let me know if I have answered your questions.