Raising protein skimmer

[LilysDad]

I have blocks similar to this one which are about 4in which Is exactly what I need will these be ok to use in the sump?

 

[T-J]

I wouldn't put it in my tank. No idea what it might leech out.
I made a skimmer stand by attaching a few pieces of PVC (as legs) to a piece of eggcrate.

 

[Freenow54]

I use a plastic bin made for storing tools, and parts. Works great

 

[BVF]

Mixed concrete has a very high pH. When set it is stable, but can still leach minerals like calcium and lime. I wouldn’t use it.

 

[Sean Clark]

I use to use one of these that I cut down to about 2 inches for my sump/skimmer combo. It worked well and because of the wide lip on top it would fit any skimmer base from 8 to 11 inches. Obviously you can cut it down to whatever rise you want for your setup.

Aftermarket Aladdin B-37 Basket Used as Replacement for 850001 Amazon product ASIN B003QMDNCG

 

[Peace River]

As others have said, I also would not use the concrete block. I have made a variety of DIY skimmer stands out of egg crate and/or other aquarium safe plastics/acrylic.