Can Australian Smelt and Gold Nugget Pleco (L018) Live Together?
Australian Smelt and Gold Nugget Pleco (L018) are not recommended as tank mates due to no temperature overlap. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Can your tank handle Australian Smelt and Gold Nugget Pleco (L018)?
Compatibility is only part of the answer. Test both fish with your real tank size, current stock, and maintenance needs to see if you have enough space and a safe stocking level before you add them.
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Behaviour & Temperament
Australian Smelt is a peaceful species (1/10), while Gold Nugget Pleco (L018) is moderately assertive (6/10). This notable difference means Gold Nugget Pleco (L018) may occasionally assert dominance over Australian Smelt.
In terms of spatial distribution, Australian Smelt prefers the Top (Surface) and Middle (Open Water) zones, whereas Gold Nugget Pleco (L018) occupies the Bottom (Substrate) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.
Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.
Worth noting: Australian Smelt is a known jumper, so a tight-fitting lid is essential.
Water Parameters
There is no temperature overlap between Australian Smelt (15–24°C) and Gold Nugget Pleco (L018) (27–32°C). This fundamental mismatch makes long-term cohabitation impractical.
Both fish can tolerate a pH between 6.5 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 5–12 dGH. Regular testing will ensure conditions stay within this range.
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Tank Setup
To house Australian Smelt and Gold Nugget Pleco (L018) together, plan for an aquarium of at least 250 litres with a minimum length of 120 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.
Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.
Specific environmental needs for this combination include: Plants - lighly covered, Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding), Established Algae (Otocinclus). Meeting these requirements will help both species thrive.
Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Australian Smelt and Gold Nugget Pleco (L018).
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
180 Gallon Standard
350 Liter (120cm Deep)
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Frequently Asked Questions
Can Australian Smelt and Gold Nugget Pleco (L018) live together?
No. This combination is not recommended. Key incompatibilities — such as non-overlapping temperature ranges — make cohabitation unsafe.
What size tank do Australian Smelt and Gold Nugget Pleco (L018) need?
A minimum of 250 litres (tank length at least 120 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.
What water temperature is best for Australian Smelt and Gold Nugget Pleco (L018) together?
Unfortunately, there is no temperature range that satisfies both species. Australian Smelt requires 15–24°C, while Gold Nugget Pleco (L018) needs 27–32°C.
Are Australian Smelt or Gold Nugget Pleco (L018) aggressive?
Australian Smelt is peaceful (1/10) and Gold Nugget Pleco (L018) is moderately assertive (6/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Australian Smelt and Gold Nugget Pleco (L018) need?
Both species overlap in the 6.5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Gold Nugget Pleco (L018)'s territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Gold Nugget Pleco (L018) space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.
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