Can Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi Live Together?
Keeping Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi together is possible but requires caution due to potential behavioral clashes. Provide a spacious tank of at least 283 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Can your tank handle Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi?
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.
Shared setup supplies
We may earn from qualifying purchases
Behaviour & Temperament
Both Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi are moderately assertive species with an aggression score of 6/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.
Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi both frequent the Middle (Open Water) and Bottom (Substrate) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.
Additional behavioural considerations to keep in mind: Two territorial species may clash over territory, especially in smaller tanks.
To improve the chances of a peaceful coexistence in this community tank: Provide a significantly larger tank (at least 50% more volume than the minimum) to allow both Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations.
Water Parameters
The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.
Both fish can tolerate a pH between 7.5 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 10–15 dGH. Regular testing will ensure conditions stay within this range.
Water care products
We may earn from qualifying purchases
Tank Setup
To house Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi together, plan for an aquarium of at least 283 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.
Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.
Specific environmental needs for this combination include: Sand (Sifters), Driftwood (Digestion/Hiding). Meeting these requirements will help both species thrive.
Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi.
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
180 Gallon Standard
350 Liter (120cm Deep)
Show 1 more tank size
Feeding products to consider
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions
Can Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 283 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi need?
A minimum of 283 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 Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi together?
Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.
Are Aequidens diadema (Diadem Cichlid) or Red Fin Borleyi aggressive?
Aequidens diadema (Diadem Cichlid) is moderately assertive (6/10) and Red Fin Borleyi is moderately assertive (6/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Aequidens diadema (Diadem Cichlid) and Red Fin Borleyi need?
Both species overlap in the 7.5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Aequidens diadema (Diadem Cichlid)'s territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Aequidens diadema (Diadem Cichlid) 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.
Related Comparisons
Aequidens diadema (Diadem Cichlid) & Aequidens sp. Atabapo
·
Aequidens diadema (Diadem Cichlid) & Apistogramma Broad-banded
·
Aequidens diadema (Diadem Cichlid) & Apistogramma macmasteri
·
Aequidens diadema (Diadem Cichlid) & Apistogramma Mamoré
·
Aequidens diadema (Diadem Cichlid) & Apistogramma Mouthbrooder (Maulbrüter)
·
Aequidens diadema (Diadem Cichlid) & Apistogramma Orange-tail
·
Red Fin Borleyi & Afra Cichlid
·
Red Fin Borleyi & African Jewel Cichlid
·
Red Fin Borleyi & Altolamprologus Calvus
·
Red Fin Borleyi & Altolamprologus Compressiceps
·
Red Fin Borleyi & Black Diamond Cichlid
·
Red Fin Borleyi & Blue Dolphin (Hap)
·