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Old 04-11-2013, 10:30 PM   #61
noobmiyavi
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Hi Qian Hu Person In Charge,

I recently purchased a Hydra 50 for my 522 tank. I am currently running OHF on that tank at the moment, but I intend to use the Hydra 50 to supplement and further improve the water quality of the tank. I have a few questions to ask, don't mind if you can give me the appropriate answers

1. How often must I change the cata pure cartridge? In the instruction stated 1 year, however I am not going to use it as my primary filter, will the lifespan be longer? How will I know if it is time to change? Will there by any symptons given out by the fish or a change in water quality?

2. If I wanna test the water parameters, I am currently using API freshwater test kit to test the various parameters(PH,Ammonia,Nitrite,Nitrate). Will the test kit be able to measure the accurate elements even with the introduction of the Hydra?

Looking forward to your answers
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