Sponges on filter intake restricting flow

kansas

I'd like to put a sponge on the end of the intake tube on my Fluval 407. Is there any chance that this will be too much resistance and that reduced water flow will damage the motor?

I'm putting some cherry shrimp in that tank and don't want them to get sucked into the filter but I'm concerned about damaging the filter.
 

BigManAquatics

If the intake sponge gets real clogged up it could happen.
 

ppate1977

You can use a panty hose but cut to fit and secured with a rubber band... If you can still find panty hose. Lol
 

Fisch

I tried to put a pre-filter on my 407. The problem is not necessarily the work of the filter, but the sponge filter clogs easily and gets a waistline. Then the filter works harder, reduces the output and efficiency of the filter.
I personally am a fan of Mattenfilters and have the 407 running behind a cornerfilter. Works pretty well.
 

TClare

I find that a sponge on the intake works fine, you just have to keep checking to make sure it is not clogged. Just check the flow every tie you do a water change and clean the sponge as and when necessary. How quickly it gets clogged up will depend to an extent on the sort of fish you have, but I have cichlids and I can usually go at least 2 weeks without taking it off and rinsing it.
 

kansas

Thanks for taking the time to answer my question.
 

Guppy777

I found that a course pre filter sponge lasts a long time before it gets clogged. Fine pre filter sponges last me about a week
 

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