I have a Marineland c530 canister filter that is sucking up the small fish, neons, to the intake and killing them.  Any ideas on how to put something over the intake to lessen the intake pressure by increasing the size of the intake?

I have a c530 Marineland canister filter and have been using it for about 6 months, I was thinking of checking it out as to see how dirty it is and replace the carbon and the polishing filter media this week.  Any suggestions on what to use to improve the filter?  I have seen on you tube several additional items.  Anyone out there have and ideas?  Thanks.

I have a 90 gallon aquarium that is having a problem with nitrates.  The other chemistry, ammonia, nitrites, etc are very good.  But my nitrates are sometime higher than I want.  Anyone know what to buy and where to buy it to help me keep those nitrates lower?  I am using a marineland  c530 along with a HOB Tetra filter, a UV and a home made bio filter.  Some suggestions would be greatly appreciated.  Thanks.

I have a 90 gallon tank with a bunch of fresh water fish.  They have been kicking off at about one a day lately.  Did a water change Sunday, my chemistry is great, no ammonia, nitrites or nitrates of any amounts dangerous to fish.  Then someone reminded me about salt,  I had forgotten about adding some when I set the tank up 6 months ago.  I have a marineland c530, a HOB tetra, a UV filter and a home made biological filter running off a power head.  The water is crystal clear and the temp is…