We will custom cut any of our foam sizes to meet your needs. You can make a full-tank filter, also known as a Hamburg Mattenfilter in some circles. Whether you want a foam filter/tank divider, pre-filter for a sump, a piece to fit your own homemade filter or a replacement foam for another manufacturer's filter, we'll cut it for you as long as it's a rectangular piece. Our water-proof reticulated foam has much greater surface area than the Matala™ style filter sheets. There is no better filter material for nitrifying bacteria made anywhere! By the way, our cost per quart is $2.78, or 3.8 cents cu/in., and even less for large quantities. Our foam is Made in the USA.
On custom-thickness pieces you have to round up to the next inch on the total thickness when entering the size in the order form below. For instance, a piece that is 10.5" x 8.5" x 1.75" is priced the same as a piece that is 10.5" x 8.5" x 2". If you order a number of custom-thick pieces that evenly divide into a Stock-Size, then you get to pay the exact cost without rounding up. Example - (2) 10.5" x 8.5" x 1.5" pieces can be figured at the exact measurements since we stock 3" thickness that can be sliced in half. Maximum Short-Side we can cut on a custom-thick piece is 12".
Maximum Long-Side is 48""
Maximum Short-Side is 29"
Keep in mind that it doesn't matter what we call the dimensions. The maximum long side is 48" and the maximum short side is 29". You can position the long side any way you want in your aquarium.
The shopping cart sometimes has a difficult time getting the shipping cost correct on these custom pieces. The carriers charge dimensional weights on some large, light packages and it can greatly affect the price. If the shipping is not correctly figured by the cart, we will let you know before cutting your foam, so you have the opportunity to cancel if you want. We will also refund a portion if the cart has figured the cost too high.
Note: Large pieces may have to be folded or rolled into a smaller package. This is done to save on shipping charges (sometimes the savings is significant). If you want your piece to remain flat during shipping, let us know and we will inform you of the additional shipping charges that you will have to pay. When receiving folded pieces, just place them on a flat surface with a bit of weight on them and within a day or two they will regain their original flat shape.
Tip: When measuring tank width, it is usually better to have it wider than needed. If the piece is too narrow, the gap will allow water to pass through unfiltered on the side. A piece that is slightly too large, will compress to fit the space. It also stays in place better. We recommend adding at least ¼" to the inside tank width, to make sure the foam fits tightly. We will be accurate to within ± 1/8" on all cuts. If you need to cut a bit off a piece, a very sharp knife works well. Some find that an electric knife works the best.
Many of these Hamburg Mattenfilter style filters have such a large surface area that they out-filter much more elaborate and expensive filters on the market. Maintenance is simple and there is almost nothing to ever break or wear out.
PPI - stands for pores per inch. So, 50 ppi means 50 pores per inch, which means they are smaller pores than 15 ppi, which is only 15 pores per inch.
Smaller pores tend to clog quicker, but offer more surface area. Literally all pores sizes will over-filter a heavily stocked aquarium. The biggest considerations are usually how quickly it will clog or are there any new-born fry that may swim into a large pore size.
The shopping cart will enable you to get a shipping quote before paying for an order. Simply add the items to the cart, view the cart by clicking on the "view cart" link in the upper left corner and it will enable you to get a total for the shipping before committing to an item.
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