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fertilizers?

1K views 5 replies 4 participants last post by  corwinlame 
#1 · (Edited)
How do I know if I need fertilizers for my planted tank?

Also:

I got the Oxygen Plus Biofilter 7 for my 50 gallon tank. But it doesn't come with an extended tube like I thought it would for some reason. Is this still a good sponge filter? In one of my other threads someone mentioned the extended tube that can make steam rather then bubbles. I"m wondering if I should exchange it for #4 which appears to have the extended tube that I assume makes the "steam"?
 
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