Active Sponge Filter

Filter - Active Sponge Filter

Regular price $9.95
Shipping calculated at checkout.

Made from our Pro-Level Reticulated Foam, specifically suited for colonizing nitrifying bacteria at the highest levels in aquariums.

Actual size varies with each filter.

  • Large - range from about 50-100 cu/in.
  • Small - ranges from about 30-60 cu/in.  

The Large can be either 15ppi Blue or 30ppi Black. We send what is ready. The Small are 50ppi Charcoal. 

Comes with lift tube. You must supply the airline.

We ship when you order, so it's your responsibility to avoid weekend and holiday delays. You should try to make sure the carrier you choose will get them from our location (14760) to yours, within 2-3 days. Orders that arrive after 8 AM est, will not ship until the following business day.

When you receive these, make sure to add any water in the bag to the tank. Do not worry about it being dirty. It is full of nitrifying bacteria and you do not want to throw this out or siphon it out with a water change until the aquarium is fully established.

Setting Up Filter: Run an airline to the lift tube. Insert the airline into the hole in the top side of the lift tube and thread it to within 1/2" of the bottom. Then insert the bottom of the lift tube into the hole in the sponge. You can put the filter into any part of the aquarium. If it floats, gently squeeze the air out of it.

Some people cut these to fit inside of power filters. That will work if the fit is tight, but if water can travel around the filter instead of through it, then that is what the water will do and it will not be as effective in establishing your aquarium.

We are not fans of "fish-less" cycling. It seems every time a customer is having trouble cycling their aquariums with our filters, it's a "fish-less" cycle. It's possible some additive in the ammonia they're adding, is interfering with their water test kit readings or is simply doing something to the nitrifying bacteria. Either way, if you add one of our active bio filters, your tank is ready for fish. Forget about adding ammonia first.

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    On the fence about this Filter - Active Sponge Filter? Don't be. Rest assured that quality is our first goal.

    Inventory Last Updated: Jan 27, 2020

    Customer Reviews

    Based on 9 reviews Write a review

    Customer Reviews

    Based on 16 reviews
    Excellent product!

    We recently purchased a new 29 gallon aquarium. We were lucky enough to be told by a friend about this sponge filter shortly after purchasing the aquarium. All we can say is this: If you are starting a new aquarium and need something that can help with the tank cycling as well as establishing your aquarium - get it, you certainly wont regret it! Its been a month now and our tank has been doing so great that we have purchased two more of these sponge filters for our other aquariums. The delivery cost is a bit steep - almost matching the cost of one sponge filter - but we are finding that its worth it. Thank you!


    Cycled my tank fast!

    Great store!

    I love using these filters! It takes all the time out of cycling your tank! You guys are awesome!

    Great product!

    I recently retired and decided to get back into Angelfish breeding as a hobby just to keep busy. I had Angelsplus send me several sets of active filters as I set up more and more new tanks. Doing this got me up and running much faster than waiting for my tanks to cycle. These filters are packed with good bacteria and within a couple of months I went from zero fish tanks to over six hundred gallons of active tanks loaded with fish I also got from there. Within weeks of the first order (some large blacks) with active filters we had fish pairing and shortly there after viable fry from multiple spawns. Success is almost a guaranty when you buy anything from Angelsplus! especially if you study their techniques and use them in your fish keeping efforts!

    Sponge filter

    It took a couple of days to cycle but it did work fine I am satisfied with the product thank you