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You are here: Home Volume XVI June 2015 The Reef Aquarium of Jonas Roman

The Reef Aquarium of Jonas Roman

By Jonas Roman Posted Jun 03, 2015 08:00 AM Pomacanthus Publications, Inc.
Swedish aquarist Jonas Roman has established a marvelously successful 650 liter (170 gallon) SPS-dominated, heavily stocked reef primarily using natural filtration methods.

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My name is Jonas. I have been devoted to this hobby since 1992. I have had several aquariums with different profiles, and this is my latest one: a SPS dominated, 650 liter reef, one year after start. Some inhabitants and corals are from my previous smaller aquarium, thus some species are around 2.5 years old under my care.

I am particularly interested in the underlying biochemistry.  I have always been fascinated by systems based mainly on natural filtration methods and have made an effort in writing some materials for my aquarium friends concerning biochemical issues.

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System and Methods

Summary of equipment:

  • Skimmer: Bubble Magus Curve 5 (run only at night)
  • Biological filter system: DSB+macroalgae refugium and Bioballs/Siporax
  • Calcium reactor: Deltec PF601
  • Circulation: 3x Ecotech Vortech MP40WS regulated by Apexcomputer
  • Lighting: Pacific Sun Pandora (3x135W LED plus 4x54W T5)

Maintenance:

  • Water change (15%) every 4th week
  • Activated carbon intermittently
  • Weekly cleaning of the mechanical filter
  • No additives
  • No GFO

 

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The filter and water purification is based mainly on natural biological filtration in the form of a DSB and a Caulerpa macroalgae filter, both located in a refugium. The lighting of the refugium is reversed, thus lighting the macroalgae 12 hours at night to obtain higher pH at night.

I have minimized the skimming and only use a small skimmer (Bubble Magus Curve 5) at some hours during the night.

The Calcium and KH "issue" is solved by a Deltec calcium reactor (Deltec PF601).  At the moment, it is running only in the daytime to minimize the pH drop at night. The return pump is a Jebaco 6000 producing around 4000l/h, and thus this is also the circulation above the DSB.  Before the water enters the DSB+algae refugium, it passes a mechanical filter, and after that bioballs and Siporax to strengthen the biological capacity and make sure that the nitrogen cycle is completed in all steps.

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I use no additives at all - no trace elements, no organic additives, only water changes of 15% every 4th week. I do not feed the corals but rely on heavily feeding the fish instead. I use some activated carbon intermittently. I use no GFO because my nutrients are very low already.

The circulation is handled by three Vortech MP40WES, regulated by the Neptune Apex cycling between a lot of different circulation programs during the day.  The Neptune Apex computer also monitors and regulates the rest of my system.

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I sometimes submit water samples to Triton Labs for plasma-analysis (ICP-OES) to be sure I am on the "way."  My current water parameter is around:

  • Calcium: 425 ppm
  • KH: 8.5 dKH
  • Mg: 1350 ppm
  • Sal: 1.024 g/l
  • Temp: 25 C
  • Nitrate: 0.2 ppm (Salifert)
  • Phosphate: "0" (Hanna checker). 0.016 ppm (Triton ICP-OES-test)

 

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Livestock

I have a heavy loaded system with a lot of healthy fishes. No fish have died since i started.

Fishes

  • Valenciennea puellaris
  • Amphiprion ocellaris
  • Pseudoanthias squamipinnis (10x)
  • Naso lituratus
  • Pomacanthus imperator (juvenile)
  • Acanthurus olivaceus
  • Zanclus canescens.  I have had my Moorish Idol for 8 months ago now :-)
  • Euxiphipops navarchus
  • Paracanthurus hepatus
  • Centropyge loriculus
  • Halichoeres melanurus

 

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Corals

  • Euphyllia glabrescens
  • Montipora digitata, confusa, and spp.
  • Acropora millepora
  • Acropora formosa
  • Acropora gomezi
  • Acroporatumida
  • Acropora carduus
  • other Acropora spp
  • Clavularia viridis
  • Zoanthus spp
  • Acanthastrea spp
  • Turbinaria reniformis
  • Seriatopora hystrix
  • Porites cylindrica
  • Stylopora pistillata
  • Caulastrea furcata
  • Tubastraea sp.

 

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Invertebrates

  • Clibanarius tricolor (10-15)
  • Clibanarius diguiti (10-15)
  • Astrea tecta (~50)
  • Collospongia spp
  • Lysmata debelius
  • Hymenocera picta

 

Additional Photos

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