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Is this gasping for air
Two days ago I started injecting CO2 using the Hagen natural plant system.
To avoid loss of CO2 I turned off the air driven under gravel filters. UGFs seem to be frowned upon for planted tanks anyway. The surface is still agitated by the Millennium 2000 hang on back type filter. This filter takes in air at the impeller and bubbles it across a grid before the filter pad which they call at wet/dry filter. Other than that no air has bubbled though this tank. The filter is set to low to further minimize surface agitation. This morning I looked at the fish before the lights turned on. The zebra danios and the golden clouds were all swimming about 1 inch from the water surface. They did not seem to be in distress as best as I could tell in dark. These fish do not normally stay at the surface during the day so this is different behavior. The clown loaches, SAEs and ottos were much deeper in the water and appeared normal. Is this gasping or some other sign of low oxygen? My PH has dropped from off the scale (I am using the test kit for my pool, Max is 8.0) to 8.0, so I believe the CO2 injection is working. I can see the bubbles get smaller as they travel though the diffuser, which also tells me the CO2 is dissolving in the water. I don't know actual levels. The Red Sea Plant Care Mini Lab test kit is about worthless. I tried to measure CO2 before injecting. The test indicated more than 20ppm. What is a good test kit For Kh, PH and CO2? The Red Sea kit does not measure PH and Kh like I thought it would but rather a single test which reads CO2 directly. If it worked witch it doesn't I do know the total alkalinity of my tap water is very high. I need to a lot of Muriatic acid to my pool at the start of each season. Muratic acid seems strong to add to the fish. So I haven't. Aquarium PH down does nothing however. |
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